A collection of lamp emission spectra for the white LEDs in a Percival plant-cultivation chamber at different nominal dimming settings.
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)
#> Summary of source_mspct [11 x 1] object: Percival_LED_dim.mspct
#> # A tibble: 11 × 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 5pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 2 10pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 3 20pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 4 30pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 5 40pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 6 50pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 7 60pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 8 70pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 9 80pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 10 90pc sour… [1,7… 250. 1050. <chr> 1 1s
#> 11 100pc sour… [1,7… 250. 1050. <chr> 1 1s