| Type: | Package |
| Title: | Spectral Irradiance Data for Lamps |
| Version: | 0.5.3 |
| Date: | 2025-09-24 |
| Maintainer: | Pedro J. Aphalo <[email protected]> |
| Description: | Spectral emission data for some frequently used lamps including bulbs and flashlights based on led emitting diodes (LEDs) but excluding LEDs available as electronic components. Original spectral irradiance data for incandescent-, LED- and discharge lamps are included. They are complemented by data on the effect of temperature on the emission by fluorescent tubes. Part of the 'r4photobiology' suite, Aphalo P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>. |
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |
| VignetteBuilder: | knitr |
| Depends: | R (≥ 4.1.0), photobiology (≥ 0.13.2) |
| Suggests: | knitr (≥ 1.50), rmarkdown (≥ 2.29), ggspectra (≥ 0.3.16), photobiologyWavebands (≥ 0.5.4), ggplot2 (≥ 3.5.0), photobiologyLEDs |
| LazyLoad: | yes |
| LazyData: | yes |
| ByteCompile: | true |
| Encoding: | UTF-8 |
| URL: | https://docs.r4photobiology.info/photobiologyLamps/, https://github.com/aphalo/photobiologylamps |
| BugReports: | https://github.com/aphalo/photobiologylamps/issues |
| RoxygenNote: | 7.3.3 |
| NeedsCompilation: | no |
| Packaged: | 2025-09-24 14:26:54 UTC; aphalo |
| Author: | Pedro J. Aphalo 
[aut, cre],
Lasse Ylianttila [ctb] |
| Repository: | CRAN |
| Date/Publication: | 2025-09-24 15:30:02 UTC |
photobiologyLamps: Spectral Irradiance Data for Lamps
Description
Spectral emission data for some frequently used lamps including bulbs and flashlights based on led emitting diodes (LEDs) but excluding LEDs available as electronic components. Original spectral irradiance data for incandescent-, LED- and discharge lamps are included. They are complemented by data on the effect of temperature on the emission by fluorescent tubes. Part of the 'r4photobiology' suite, Aphalo P. J. (2015) doi:10.19232/uv4pb.2015.1.14.
Details
This package contains emission spectra for different types of lamps including LED lamps sold as fully assembled light bulbs or luminaires but excluding LEDs sold as components requiring separate electronic driver modules or circuits. Lamps have been measured with an assortment of different instruments over more than 25 years in our lab or by collaborators. Some of the lamp types are no longer in production but the data are relevant for the interpretation of old scientific publications. Data for lamps emitting in the UV and VIS regions of the spectrum are included in the main data set.
The main data set lamps.mspct contains spectra for different lamps all
of them measured at air temperatures between 20 C and 25 C complemented by
vectors of names to be used as indexes to extract different subsets of
spectra. These spectral data are normalized to spectral energy irradiance
equal to one at their maximum (strongest emission peak).
In addition a set of spectral emission for UVB lamps exposed to different
ambient temperatures and a data set from a four channels LED bulb are
included as two additional collections of spectra. Temperature response data
are included both as a source_mspct object and as a source_spct
object (to ensure backwards compatibility).
The third collection of spectra contains data for the 16 different _colors_ of light emitted by a household four channel LED bulb.
Warning!
None of the spectral data included in this package are based on supplier's specifications and are only provided for information. The exact emission spectrum depends to some extent on testing conditions, but more importantly among individual lamps. It is not uncommon for suppliers to revise specifications during the lifetime of a product type without changing the product denomination. There can be also some variation from batch to batch. It is important to make sure that the type considered exactly matches. Frequently variations of a lamp type, with type denomination differing in a single letter or number, have quite different spectral characteristics. In other words, the data provided here are not a substitute for actual measurements of the radiation emission spectrum of the lamps actually used in a given piece of scientific research. For less demanding situations the data are in most cases reliable enough but perfect agreement with measurements on other lamps of the same exact type should not be expected. This is specially true for those data measured more than a few years ago when compared to lamps being currently sold under the same type denomination.
Author(s)
Maintainer: Pedro J. Aphalo [email protected] (ORCID)
Other contributors:
Lasse Ylianttila [contributor]
References
Aphalo, Pedro J. (2015) The r4photobiology suite. UV4Plants Bulletin, 2015:1, 21-29. doi:10.19232/uv4pb.2015.1.14.
See Also
Packages photobiology-package and
ggspectra-package.
Examples
library(photobiologyLamps)
library(photobiologyWavebands)
# extract one spectrum
lamps.mspct$Generic.Inc.bulb.60W
lamps.mspct[["Generic.Inc.bulb.60W"]]
# using one spectrum in a calculation
q_ratio(lamps.mspct$Generic.Inc.bulb.60W, Blue(), Green())
# extracting all the spectra measured with a given instrument
lamps.mspct[bentham_lamps]
Spectra for a custom LED source in growth chamber
Description
A collection of LED emission spectra for the white LEDs in an Aralab plant-cultivation chamber at different nominal dimming settings.
Usage
Nichia_LED_RECOM_dim.mspct
Format
Nichia_LED_RECOM_dim.mspct is a "source_mspct" object
containing a collection of 11 "source_spct" objects as members.
Members are named.
Details
Nichia_LED_RECOM_dim.mspct contains a collection of
"source_spct" objects with spectral emission data for different
dimming settings. The entrance optics, a cosine diffuser, was kept at a
distance of 24 cm from light source. Thus, the different spectra are
comparable and provided expressed in calibrated spectral energy irradiance
units.
This growth chamber uses as light source a custom-built panel of Nichia Optisolis LEDs with CRI 97 rating based on LinearZ modules suplied by Lumitronix. Each LED module is driven by an RCD-48-.350 driver dimmed in constant current mode using a voltage supplied by the chamber controller.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Growth chamber manufacturer: https://aralab.pt/.
LED modules manufacturer: https://www.lumitronix.com/en.
SMD LEDs manufacturer: https://www.nichia.co.jp/en/.
LED drivers manufacturer: https://recom-power.com/en/. #'
Examples
summary(Nichia_LED_RECOM_dim.mspct)
Spectral irradiance of white fluorescent tubes at different temperatures.
Description
Dataset of spectral irradiance from a set of four Osram L 18W/840 Lumilux fluorescent tubes in an Aralab FitoClima 1200 growth chamber. The tubes are located in the temperature controlled space.
Usage
Osram_L_18W_840_temp.mspct
Format
Osram_L_18W_840_temp.mspct is a "source_mspct" object
containing a collection of "source_spct" objects, each with 1775 rows
(250 nm to 1050 nm, 0.42 to 0.48 nm step) and 2 variables.
The variables in the member spectra are as follows:
w.length (nm)
s.e.irrad (W m-2 nm-1)
Details
Absolute values are comparable among the different temperatures as the location of the entrance optics remained unchanged and dimming at 100 The lamps and the cosine diffuser were located inside the growth chamber. The Ocean Optics Maya 2000Pro array spectroradiometer as kept outside the chamber at a room temperature of approximately 22 C. After each change in the temperature controller set-point enough time was allowed after the temperature had stabilized inside the chamber, for the output of the lamps to also become stable.
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex set
of corrections and calibration procedure used. The source_spct objects
have attributes with additional information on the measurement and data
processing. Measurements done by Pedro J. Aphalo. Data acquired and processed
using R packages 'ooacquire' and 'photobiology'.
Examples
Osram_L_18W_840_temp.mspct[["20C"]]
Spectra for a Percival growth chamber
Description
A collection of lamp emission spectra for the white LEDs in a Percival plant-cultivation chamber at different nominal dimming settings.
Usage
Percival_LED_dim.mspct
Format
Percival_LED_dim.mspct is a "source_mspct" object
containing a collection of 11 "source_spct" objects as members.
Members are named.
Details
Percival_LED_dim.mspct contains a collection of
"source_spct" objects with spectral emission data for different
dimming settings. The diffuser was maintained at the same distance from the
LEDs. Thus, the different spectra are comparable and provided expressed in
calibrated spectral energy irradiance units.
This growth chamber uses as light source a panel of LEDs above each shelf at a close distance from plants.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Growth chamber manufacturer: https://percival-scientific.com/.
Examples
summary(Percival_LED_dim.mspct)
Spectra for an Amaran AL-M9 LED video light
Description
A collection of lamp emission spectra for an Aputure Amaran pocket-sized daylight-balanced LED light type AL-M9.
Usage
amaran_m9.mspct
Format
amaran_m9.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
Details
amaran_m9.mspct contains a collection of
"source_spct" objects with spectral emission data for six different
dimming settings. The lamp was maintained at the same distance of 160 mm
from the input optics of the spectrometer. In all cases the diffuser was
kept in place. Thus, the different spectra are comparable and provided
expressed in calibrated spectral energy irradiance units.
This light source has 9 LEDs in a 3 \times 3 grid. The LEDs are
in SMD packages. A built-in Lithium battery powers it. It comes with a
detachable plastic diffuser
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Lamp manufacturer: https://aputure.com/.
Aphalo, Pedro J. (2022) Small fill/video LED lights revisited: A new comparison. https://www.photo-spectrum.info/pages/illumination/led-fill-lights-2.html.
Examples
summary(amaran_m9.mspct)
Spectra for an Andoer IR49 LED video lamp
Description
A collection of two light emission spectra for a small infra-red emitting LED-based light source for video and photography. The lamp is advertised as "Andoer IR49S Mini IR Night Vision Light"
Usage
andoer_ir49.mspct
Format
andoer_ir49.mspct is a "source_mspct" object containing
a collection of two "source_spct" objects as members. Members are
named.
Details
andoer_ir49.mspct contains a collection of two
"source_spct" objects with spectral emission data for the lamp at
full and minimum power. Dimming setting is stepless. The lamp was
maintained at the same distance from the input optics so the two spectra
are comparable and provided expressed in calibrated spectral energy
irradiance units.
This light source has 49 LEDs in a 7 \times 7 grid. The LEDs are
in through-hole packages. A built-in Lithium battery powers it.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
Examples
summary(andoer_ir49.mspct)
Spectra acquired with Bentham spectrometer
Description
Spectra measured with a Bentham spectroradiometer. Datasets contain wavelengths at a 0.5 nm interval and corresponding values for spectral emittance from different lamps. As absolute values are not meaningful because measuring distances are in most cases unknown data have been normalized to one at the wavelength of maximum energy irradiance.
Usage
bentham_lamps
Format
An object of class character of length 2.
Details
bentham_lamps is a character vector with indexes to members of
lamps.mspct
Note
Instrument used: Bentham scanning double monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated at STUK (Radiation Safety Authority Finland). Measurements done by Lasse Ylianttila (STUK, Helsinki, Finland).
Examples
bentham_lamps
Spectra for an Elgato Key Light Mini LED video lamp
Description
A collection of lamp emission spectra for an Elgato Key Light Mini bi-colour LED lamp for video and photography.
Usage
elgato_klm_cct.mspct
elgato_klm_dim.mspct
Format
elgato_klm_cct.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
An object of class source_mspct (inherits from generic_mspct, list) with 6 rows and 1 columns.
Details
elgato_klm_cct.mspct contains a collection of
"source_spct" objects with spectral emission data for different
colour temperature (CCT) settings at full power. The lamp was maintained at
the same distance of 170 mm from the input optics of the spectrometer.
Thus, the different spectra are comparable and provided expressed in
calibrated spectral energy irradiance units.
elgato_klm_dim.mspct contains a collection of
"source_spct" objects with spectral emission data for different
dimming settings at a CCT setting of 4000 K. The lamp was maintained at
the same distance of 165 mm from the input optics of the spectrometer.
Thus, the different spectra are comparable and provided expressed in
calibrated spectral energy irradiance units.
This light source uses LEDs on the edges of a diffusion panel giving very evenly distributed diffuse light. It is based on Osram warm white light and cool white LEDs. A built-in Lithium battery powers it. The mix of warm and cool light can be adjusted as well as the dimming. Remote control through Wifi is possible.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Lamp manufacturer: https://www.elgato.com/.
Aphalo, Pedro J. (2022) Small fill/video LED lights revisited: A new comparison. https://www.photo-spectrum.info/pages/illumination/led-fill-lights-2.html.
Examples
summary(elgato_klm_cct.mspct)
summary(elgato_klm_dim.mspct)
Spectral data for Lamps from different suppliers
Description
Names of members of the lamps.mspct collection of spectra
grouped by brand name.
Usage
lamp_brands
Osram_lamps
Philips_lamps
Sylvania_lamps
QPanel_lamps
Airam_lamps
Toshiba_lamps
Aputure_lamps
Sunwayfoto_lamps
Godox_lamps
Valoya_lamps
Fluence_lamps
Convoy_lamps
Jaxman_lamps
Generic_lamps
Format
A vector of character strings.
An object of class character of length 8.
An object of class character of length 16.
An object of class character of length 1.
An object of class character of length 2.
An object of class character of length 5.
An object of class character of length 2.
An object of class character of length 1.
An object of class character of length 3.
An object of class character of length 4.
An object of class character of length 2.
An object of class character of length 7.
An object of class character of length 2.
An object of class character of length 2.
An object of class character of length 12.
Details
The character vectors described here contain the names of the
spectra for lamps from each brand to facilitate their extraction from the
collection. One additional vector, lamp_brands contains the names of
the brands as used in the names of the spectra in the collection.
Osram
Lamps branded Osram are currently sold by Ledvance, of Chinese ownership. Osram currently makes and sells other products. When Osram (Germany) and Sylvania (USA) merged years back both brands remained in use in different markets and many types of lamps remained differentiated. .
Philips
Lamps branded Philips are sold by Signify Netherlands B.V.
Sylvania
Lamps branded Sylvania are currently sold by Ledvance in the USA, of Chinese ownership. Osram currently makes and sells other products. When Osram (Germany) and Sylvania (USA) merged years back both brands remained in use in different markets and many types of lamps remained differentiated.
Q-LAB
Q-Lab Corporation is a global provider of material durability testing products including UV-B and UV-A lamps used in test cabinets.
Airam
Airam Electric Oy Ab is Finnish supplier and manufacturer of lamps and luminaires.
Toshiba
Lamps branded Toshiba are sold by Toshiba Lighting.
Aputure
Aputure is a Chinese supplier of LED lighting and related equipment for filmmaking.
Sunwayfoto
Sunwayfoto is a Chinese supplier of ancillary equipment for photography, including battery-powered fill-in LED lights with high CRI ratings..
Godox
Godox is a Chinese supplier of photography and video lighting equipment. They sell both LED lights and Xenon flashes of a wide range to output power.
Valoya
Valoya Oy (Finland) sells LED lamps and luminaires for commercial plant cultivation. Both for indoor cultivation and to supplement sunlight in greenhouses.
Fluence
Fluence, a division of Osram, sells LED luminaires for commercial plant cultivation. Both for indoor cultivation and to supplement sunlight in greenhouses.
Convoy
Is a Chinese supplier of LED flashlights/torches and their parts. Sold through AliExpress, eBay and Banggood.
Jaxman
Is a Chinese supplier of LED flashlights/torches. Formerly sold through AliExpress.
Generic, shop branded or distributor branded
We group under this category shop-branded or generic (no-brand) lamps that usually have specifications with limited details. These lamps are unlikely to remain consistent from batch to batch or have limited availability.
Note
Some of the lamps are from resellers' brands, usually obscure ones, and others are from well-known brands. Some of the brands have changed ownership through take-overs and merges. When known the vintage is indicated in the comment field of each spectrum. Multiple brands may also belong to the same company.
References
https://www.lighting.philips.com
https://www.ledvanceus.com/Pages/default.aspx
https://www.tlt.co.jp/tlt/index_e.htm
See Also
Other indexing vectors of names:
lamp_colors,
lamp_types,
lamp_uses
Other indexing vectors of names:
lamp_colors,
lamp_types,
lamp_uses
Examples
lamp_brands
Osram_lamps
Spectral data for Lamps of different colours
Description
Names of members of the lamps.mspct collection of spectra
grouped by colour or wavelength band.
Usage
lamp_colors
uv_lamps
purple_lamps
blue_lamps
green_lamps
yellow_lamps
orange_lamps
red_lamps
ir_lamps
amber_lamps
white_lamps
Format
A vector of character strings.
An object of class character of length 11.
An object of class character of length 0.
An object of class character of length 0.
An object of class character of length 0.
An object of class character of length 0.
An object of class character of length 0.
An object of class character of length 4.
An object of class character of length 2.
An object of class character of length 0.
An object of class character of length 50.
Details
contain the names of the members of lamps.mspct with peaks of
emission within the wavelength range corresponding to the light colours as
defined by ISO standards. Vector amber_lamps is the union of
"yellow_lamps" and "orange_lamps". Vector white_lamps
contains the names of spectra for lamps with broad or multiple peaks of
emission in the visible range. Vectors "uv_lamps" and
"ir_lamps" contain the names for lamps with peak emission at
wavelengths < 400 nm and wavelengths > 700 nm, respectively. One
additional vector, lamp_colors contains the names of
the colors as used in the vectors.
These vectors can be used to extract subsets of spectra from
lamps.mspct.
See Also
Other indexing vectors of names:
lamp_brands,
lamp_types,
lamp_uses
Examples
lamp_colors
uv_lamps
blue_lamps
red_lamps
white_lamps
# select data for lamps emitting in the ultraviolet region
lamps.mspct[uv_lamps]
Spectral data for Lamps of different types
Description
Names of members of the lamps.mspct collection of spectra
grouped by the technology their are based on, i.e., type.
Usage
lamp_types
incandescent_lamps
fluorescent_lamps
led_lamps
mercury_lamps
multimetal_lamps
sodium_lamps
xenon_lamps
Format
A vector of character strings.
An object of class character of length 3.
An object of class character of length 24.
An object of class character of length 33.
An object of class character of length 25.
An object of class character of length 1.
An object of class character of length 1.
An object of class character of length 4.
Details
These vectors can be used to extract subsets of spectra from
lamps.mspct. One additional vector, lamp_types contains the
names used for types of lamps in the names and vectors.
Note
In the case of LED-based lamps we include here only ready built
commercially available lamps. In some cases assembled from multiple
discrete LEDs, possible of mixed types and spectral output. For emission
spectra for LEDs available as electronic components please see
photobiologyLEDs-package.
See Also
Other indexing vectors of names:
lamp_brands,
lamp_colors,
lamp_uses
Examples
lamp_types
sodium_lamps
multimetal_lamps
mercury_lamps
led_lamps
# select lamps emitting in the amber, yellow, orange region
lamps.mspct[sodium_lamps]
Spectral data for Lamps designed for specific uses
Description
Names of members of the lamps.mspct collection of spectra
grouped by intended use.
Usage
lamp_uses
photography_lamps
plant_grow_lamps
germicidal_lamps
flashlights
Format
A vector of character strings.
An object of class character of length 8.
An object of class character of length 9.
An object of class character of length 1.
An object of class character of length 6.
Details
These vectors can be used to extract subsets of spectra from
lamps.mspct. The set of names is not exhaustive. One additional
vector, lamp_uses contains the naming given to intended specific
lamp uses. Photography and video lamps are listed together in the vector
photography_lamps.
Note
In the case of LED-based lamps we include here only ready built
commercially available lamps. In some cases assembled from multiple
discrete LEDs, possible of mixed types and spectral output. For emission
spectra for LEDs available as electronic components please see
photobiologyLEDs-package.
See Also
Other indexing vectors of names:
lamp_brands,
lamp_colors,
lamp_types
Examples
plant_grow_lamps
photography_lamps
# select lamps for photography
lamps.mspct[photography_lamps]
Spectral irradiance for diverse lamps
Description
A collection of lamp emission spectra measured with different spectroradiometers.
Usage
lamps.mspct
Format
A "source_mspct" object containing several
"source_spct".
Details
The "source_mspct" object contains "source_spct"
objects with spectral emission data. These classes are defined in
package photobiology-package together with
corresponding methods and functions.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (relative energy based units)
Note
Please see the help corresponding to each instrument for details.
See Also
bentham_lamps, licor_lamps, macam_lamps,
oo_maya_lamps for information on the spectroradiometers, and
photobiologyLEDs-package for spectra for LEDs available
as electronic components.
Examples
uv_lamps
union(QPanel_lamps, uv_lamps)
lamps.mspct[union(Philips_lamps, red_lamps)]
lamps.mspct$QPanel.FT.UVB313.40W
Spectra for a multichannel LED bulb
Description
A collection of lamp emission spectra for a household LED bulb with four channels and a remote control allowing color mixing. In addition character vectors useful as indexes for extracting subsets of the data are defined. Pairs of RGB channels are used in mixes. This is by design of the lamp and/or its remote control. The lamp here used is a 7.6 W, 230 V, E-27 LED lamp bulb accompanied by a small wireless remote control from a Swedish supplier. Similar (identical?) lamps are at the moment (early 2018) widely available through eBay and Aliexpress sellers. This type of lamps is no longer available under the Ledsavers brand.
Usage
ledsavers.mspct
ledsavers_channels
ledsavers_mixes
ledsavers_RG_mixes
ledsavers_RB_mixes
ledsavers_GB_mixes
Format
ledsavers.mspct is a "source_mspct" object containing
a collection of 16 "source_spct" objects as members. Members are
named.
ledsavers_channels, ledsavers_mixes, ledsavers_RG_mixes,
ledsavers_RB_mixes, ledsavers_GB_mixes are character vectors
containing subsets of names(ledsavers.mspct).
An object of class character of length 4.
An object of class character of length 12.
An object of class character of length 4.
An object of class character of length 4.
An object of class character of length 4.
Details
ledsavers.mspct contains a collection of 16 "source_spct"
objects with spectral emission data for each of the colors obtainable from
the lamp. All colors were measured at maximum power output although the lamp
supports dimming. The lamp was maintained at the same distance from the
input optics so the different spectra are comparable and provided expressed
in calibrated spectral energy irradiance units.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Acknowledgements
We thank Prof. Lars Olof Bjoern for the gift of the lamp.
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. Raw spectral data
processed with R package MayaCalc. The source_spct objects have
attributes with additional information on the measurement and data processing.
Measurements done by Pedro J. Aphalo. Data acquired using R package 'ooacquire'.
Examples
ledsavers_channels
ledsavers.mspct$W
ledsavers.mspct[["W"]]
ledsavers.mspct[ledsavers_channels]
Spectra acquired with LI-COR LI-1800
Description
Lamp emission spectra measured with a LI-COR LI-1800 spectroradiometer. Member spectra containing the wavelengths at a 0.5 nm, 1.0 nm, or 2.0 nm interval and tabulated values of spectral irradiance for different lamps. As absolute values are not meaningful because measuring distances are in most cases unknown data have been normalized to one at the wavelength of maximum energy irradiance.
Usage
licor_lamps
Format
A vector of character strings.
Details
licor is a character vector with indexes to members of
lamps.mspct
Note
Instrument used: LI-COR LI1800 scanning single monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated with a LI-COR calibration lamp. Measurements done by Pedro J. Aphalo between 1992 and 2001.
Examples
licor_lamps
Spectra acquired with Macam SR-9010-PC
Description
Lamp emission spectra measured with a Macam SR-9010-PC spectroradiometer.
Usage
macam_lamps
Format
A vector of character strings.
Details
macam_lamps is a character vector with indexes to members of
lamps.mspct.
Note
Instrument used: Macam SR-9010-PC scanning double monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated. The lamps were probably driven by a high frequency electronic ballast. Measured between 1996 to 1998.
References
Aphalo, P J, R Tegelberg, and R Julkunen-Tiitto. 1999. The Modulated UV-B Irradiation System at the University of Joensuu. Biotronics 28: 109-120. https://hdl.handle.net/2324/8257.
Examples
macam_lamps
Spectra acquired with Ocean Optics Maya2000 Pro
Description
Spectra measured with a Ocean Optics Maya2000 Pro spectroradiometer. Datasets contain wavelengths at variable intervals and corresponding values for spectral emittance from different lamps. Absolute values are not meaningful because data have been normalized to one at the wavelength of maximum energy irradiance.
Usage
oo_maya_lamps
Format
A vector of character strings.
Details
oo_maya_lamps is a character vector with indexes to members of
lamps.mspct
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. Raw spectral data
processed with R package MayaCalc. The source_spct object contains a
comment with additional information on the measurement and data processing.
Measurements done by Pedro J. Aphalo.
Examples
oo_maya_lamps
Spectral irradiance of UVB lamps at different temperatures.
Description
Dataset of spectral irradiance from a set of two Q-Panel UVB-313 40W fluorescent tubes, measured at different temperatures.
Usage
qp_uvb313_temp.spct
qp_uvb313_temp.mspct
Format
qp_uvb313_temp.spct is a "source_spct" object with 777 rows (290 nm to 400 nm, 1.0 nm step) and 3
variables.
The variables are as follows:
temperature (C)
w.length (nm)
s.e.irrad (W m-2 nm-1)
qp_uvb313_temp.mspct is a "source_mspct" object containing a
collection of
"source_spct" objects, each with 111 rows (290 nm to 400 nm,
1.0 nm step) and 2 variables.
The variables in the member spectra are as follows:
w.length (nm)
s.e.irrad (W m-2 nm-1)
An object of class source_mspct (inherits from generic_mspct, list) with 7 rows and 1 columns.
Details
Absolute values are comparable among the different temperatures. The lamps and the cosine diffuser were located inside a Conviron growth chamber. The measurements were done with a recently calibrated Macam double-monochromator spectroradiometer located outside the chamber and maintained at constant room temperature of 22 C. After each change in the temperature controller set-point enough time was allowed after the temperature had stabilized inside the chamber, for the output of the lamps to also become stable.
qp_uvb313_temp.spct contains data for different
temperatures in a "tidy" long form with a factor indicating the temperature
at which the lamp was during measurement.
qp_uvb313_temp.mspct
contains the same data as a collection of spectra stored in a
"source_mspct" object, with member "source_spct" objects
named minus5C, plus00C, plus05C, plus10C, plus20C, plus30C, and plus35C.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Note
Instrument used: Macam SR-9010-PC scanning double monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated. The lamps were driven by a high frequency electronic ballast.
References
Aphalo, P J, R Tegelberg, and R Julkunen-Tiitto. 1999. The Modulated UV-B Irradiation System at the University of Joensuu. Biotronics 28: 109–120. https://hdl.handle.net/2324/8257.
Examples
qp_uvb313_temp.mspct[["plus20C"]]
Spectra for a Sunwayfoto FL96 LED video light
Description
A collection of lamp emission spectra for a Sunwayfoto LED fill light type FL96.
Usage
sunwayfoto_fl96.mspct
Format
sunwayfoto_fl96.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
Details
sunwayfoto_fl96.mspct contains a collection of
"source_spct" objects with spectral emission data for different
dimming and colour temperature settings. The lamp was maintained at the
same distance from the input optics of the spectrometer. Thus, the
different spectra are comparable and provided expressed in calibrated
spectral energy irradiance units.
This light source has 96 white LEDs half emitting warm white light and half emitting cool white light. The LEDs are in SMD packages and are interspersed. A built-in Lithium battery powers it. The mix of warm and cool light can be adjusted as well as the overall power output.
The variables in each member spectrum are as follows:
-
w.length (nm)
s.e.irrad (
\mathrm{W\,m^{-2}\,nm^{-1}})
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Lamp manufacturer: https://sunwayfoto.com/.
Aphalo, Pedro J. (2022) Small fill/video LED lights revisited: A new comparison. https://www.photo-spectrum.info/pages/illumination/led-fill-lights-2.html.
Examples
summary(sunwayfoto_fl96.mspct)