Spectra for an Elgato Key Light Mini LED video lamp
Source:R/elgato-mkl-mspct.r
elgato_klm_cct.mspct.RdA collection of lamp emission spectra for an Elgato Key Light Mini bi-colour LED lamp for video and photography.
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 of source_mspct [12 x 1] object: elgato_klm_cct.mspct
#> # A tibble: 12 × 8
#> spct.idx class dim w.length.min w.length.max colnames multiple.wl time.unit
#> <chr> <chr> <chr> <dbl> <dbl> <list> <dbl> <Duratio>
#> 1 at.7000… sour… [320… 251. 899. <chr> 1 1s
#> 2 at.6500… sour… [327… 251. 899. <chr> 1 1s
#> 3 at.6000… sour… [329… 251. 899. <chr> 1 1s
#> 4 at.5500… sour… [330… 251. 899. <chr> 1 1s
#> 5 at.5000… sour… [322… 251. 899. <chr> 1 1s
#> 6 at.4500… sour… [325… 251. 899. <chr> 1 1s
#> 7 at.4250… sour… [324… 251. 899. <chr> 1 1s
#> 8 at.4000… sour… [328… 251. 899. <chr> 1 1s
#> 9 at.3750… sour… [342… 251. 899. <chr> 1 1s
#> 10 at.3500… sour… [363… 251. 899. <chr> 1 1s
#> 11 at.3250… sour… [377… 251. 899. <chr> 1 1s
#> 12 at.2900… sour… [367… 251. 899. <chr> 1 1s
summary(elgato_klm_dim.mspct)
#> Summary of source_mspct [6 x 1] object: elgato_klm_dim.mspct
#> # A tibble: 6 × 8
#> spct.idx class dim w.length.min w.length.max colnames multiple.wl time.unit
#> <chr> <chr> <chr> <dbl> <dbl> <list> <dbl> <Duratio>
#> 1 at.4000K… sour… [314… 251. 899. <chr> 1 1s
#> 2 at.4000K… sour… [361… 251. 899. <chr> 1 1s
#> 3 at.4000K… sour… [433… 251. 899. <chr> 1 1s
#> 4 at.4000K… sour… [543… 251. 899. <chr> 1 1s
#> 5 at.4000K… sour… [689… 251. 899. <chr> 1 1s
#> 6 at.4000K… sour… [805… 251. 899. <chr> 1 1s