,
Lasse Ylianttila [ctb]| Title: | 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>. |
| Authors: | Pedro J. Aphalo [aut, cre] ,
Lasse Ylianttila [ctb] |
| Maintainer: | Pedro J. Aphalo <[email protected]> |
| License: | GPL (>= 2) |
| Version: | 0.5.2.9000 |
| Built: | 2024-12-11 06:27:54 UTC |
| Source: | https://github.com/aphalo/photobiologyLamps |
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.
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.
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.
Maintainer: Pedro J. Aphalo [email protected] (ORCID)
Other contributors:
Lasse Ylianttila [contributor]
Aphalo, Pedro J. (2015) The r4photobiology suite. UV4Plants Bulletin, 2015:1, 21-29. doi:10.19232/uv4pb.2015.1.14.
Packages photobiology-package and
ggspectra-package.
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]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]
A collection of lamp emission spectra for an Aputure Amaran pocket-sized daylight-balanced LED light type AL-M9.
amaran_m9.mspctamaran_m9.mspct
amaran_m9.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
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 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 ()
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'.
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.
summary(amaran_m9.mspct)summary(amaran_m9.mspct)
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"
andoer_ir49.mspctandoer_ir49.mspct
andoer_ir49.mspct is a "source_mspct" object containing
a collection of two "source_spct" objects as members. Members are
named.
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 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 ()
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'.
summary(andoer_ir49.mspct)summary(andoer_ir49.mspct)
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.
bentham_lampsbentham_lamps
An object of class character of length 2.
bentham_lamps is a character vector with indexes to members of
lamps.mspct
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).
bentham_lampsbentham_lamps
A collection of lamp emission spectra for an Elgato Key Light Mini bi-colour LED lamp for video and photography.
elgato_klm_cct.mspct elgato_klm_dim.mspctelgato_klm_cct.mspct elgato_klm_dim.mspct
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.
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 ()
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'.
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.
summary(elgato_klm_cct.mspct) summary(elgato_klm_dim.mspct)summary(elgato_klm_cct.mspct) summary(elgato_klm_dim.mspct)
The collection of spectra lamps.mspct contains spectra for
light bulds, luminaires and other ready-to-use lamps from various current
and former suppliers. 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.
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_lampslamp_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
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 1.
An object of class character of length 2.
An object of class character of length 12.
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. .
Lamps branded Philips are sold by Signify Netherlands B.V.
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 Corporation is a global provider of material durability testing products including UV-B and UV-A lamps used in test cabinets.
Airam Electric Oy Ab is Finnish supplier and manufacturer of lamps and luminaires.
Lamps branded Toshiba are sold by Toshiba Lighting.
Aputure is a Chinese supplier of LED lighting and related equipment for filmmaking.
Sunwayfoto is a Chinese supplier of ancillary equipment for photography, including battery-powered fill-in LED lights with high CRI ratings..
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 Oy (Finland) sells LED lamps and luminaires for commercial plant cultivation. Both for indoor cultivation and to supplement sunlight in greenhouses.
Fluence, a division of Osram, sells LED luminaires for commercial plant cultivation. Both for indoor cultivation and to supplement sunlight in greenhouses.
Is a Chinese supplier of LED flashlights/torches and their parts. Sold through AliExpress, eBay and Banggood.
Is a Chinese supplier of LED flashlights/torches. Formerly sold through AliExpress.
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.
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.
https://www.lighting.philips.com/home
https://www.ledvanceus.com/Pages/default.aspx
https://www.tlt.co.jp/tlt/index_e.htm
lamp_brands Osram_lampslamp_brands Osram_lamps
Names of members of the collection of emission spectra
lamps.mspct grouped by the wavelength at which they emit.
lamp_colors uv_lamps purple_lamps ir_lamps blue_lamps green_lamps yellow_lamps orange_lamps red_lamps amber_lamps white_lampslamp_colors uv_lamps purple_lamps ir_lamps blue_lamps green_lamps yellow_lamps orange_lamps red_lamps amber_lamps white_lamps
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 2.
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 0.
An object of class character of length 49.
The character vectors "uv_leds", "purple_leds",
"blue_leds", "green_leds", "yellow_leds",
"orange_leds" and "red_leds" 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.
These vectors can be used to extract subsets of spectra from
lamps.mspct.
uv_lamps blue_lamps red_lamps white_lamps # select data for lamps emitting in the ultraviolet region lamps.mspct[uv_lamps]uv_lamps blue_lamps red_lamps white_lamps # select data for lamps emitting in the ultraviolet region lamps.mspct[uv_lamps]
Names of datasets containing the wavelengths and tabulated values spectral emittance for the lamps of different types.
lamp_types incandescent_lamps fluorescent_lamps led_lamps mercury_lamps multimetal_lamps sodium_lamps xenon_lampslamp_types incandescent_lamps fluorescent_lamps led_lamps mercury_lamps multimetal_lamps sodium_lamps xenon_lamps
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 32.
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.
In the case of LED-based lamps we include here only ready built commercially
available lamps.
In some cases assembled from multiple descrete LEDs, possible of mixed types and
spectral output. For emission spectra for LEDs available as electronic components
please see photobiologyLEDs-package.
sodium_lamps multimetal_lamps mercury_lamps led_lamps # select lamps emitting in the amber, yellow, orange region lamps.mspct[sodium_lamps]sodium_lamps multimetal_lamps mercury_lamps led_lamps # select lamps emitting in the amber, yellow, orange region lamps.mspct[sodium_lamps]
A collection of lamp emission spectra measured with different spectroradiometers.
lamps.mspctlamps.mspct
A "source_mspct" object containing several
"source_spct".
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)
Please see the help corresponding to each instrument for details.
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.
uv_lamps union(QPanel_lamps, uv_lamps) lamps.mspct[union(Philips_lamps, red_lamps)] lamps.mspct$QPanel.FT.UVB313.40Wuv_lamps union(QPanel_lamps, uv_lamps) lamps.mspct[union(Philips_lamps, red_lamps)] lamps.mspct$QPanel.FT.UVB313.40W
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.
ledsavers.mspct ledsavers_channels ledsavers_mixes ledsavers_RG_mixes ledsavers_RB_mixes ledsavers_GB_mixesledsavers.mspct ledsavers_channels ledsavers_mixes ledsavers_RG_mixes ledsavers_RB_mixes ledsavers_GB_mixes
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.
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 ()
We thank Prof. Lars Olof Bjoern for the gift of the lamp.
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'.
https://www.kjell.com/varumarken/ledsavers
ledsavers_channels ledsavers.mspct$W ledsavers.mspct[["W"]] ledsavers.mspct[ledsavers_channels]ledsavers_channels ledsavers.mspct$W ledsavers.mspct[["W"]] ledsavers.mspct[ledsavers_channels]
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.
licor_lampslicor_lamps
A vector of character strings.
licor is a character vector with indexes to members of
lamps.mspct
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.
licor_lampslicor_lamps
Lamp emission spectra measured with a Macam SR-9010-PC spectroradiometer.
macam_lampsmacam_lamps
A vector of character strings.
macam_lamps is a character vector with indexes to members of
lamps.mspct.
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.
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://cir.nii.ac.jp/crid/1050001335921484032?lang=en.
macam_lampsmacam_lamps
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.
oo_maya_lampsoo_maya_lamps
A vector of character strings.
oo_maya_lamps is a character vector with indexes to members of
lamps.mspct
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.
oo_maya_lampsoo_maya_lamps
Names of datasets containing the wavelengths and tabulated values spectral emittance for the lamps grouped by special use.
photography_lamps plant_grow_lamps germicidal_lampsphotography_lamps plant_grow_lamps germicidal_lamps
A vector of character strings.
An object of class character of length 9.
An object of class character of length 1.
In the case of LED-based lamps we include here only ready built commercially
available lamps.
In some cases assembled from multiple descrete LEDs, possible of mixed types and
spectral output. For emission spectra for LEDs available as electronic components
please see photobiologyLEDs-package.
plant_grow_lamps photography_lamps # select lamps for photography lamps.mspct[photography_lamps]plant_grow_lamps photography_lamps # select lamps for photography lamps.mspct[photography_lamps]
Dataset of spectral irradiance from a set of two Q-Panel UVB-313 40W fluorescent tubes, measured at different temperatures.
qp_uvb313_temp.spct qp_uvb313_temp.mspctqp_uvb313_temp.spct qp_uvb313_temp.mspct
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.
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 ()
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.
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://cir.nii.ac.jp/crid/1050001335921484032?lang=en.
qp_uvb313_temp.mspct[["plus20C"]]qp_uvb313_temp.mspct[["plus20C"]]
A collection of lamp emission spectra for a Sunwayfoto LED fill light type FL96.
sunwayfoto_fl96.mspctsunwayfoto_fl96.mspct
sunwayfoto_fl96.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
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 ()
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'.
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.
summary(sunwayfoto_fl96.mspct)summary(sunwayfoto_fl96.mspct)