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Spectra for a custom LED source in growth chamber

Source: R/nichia-led-recom-dim-mspct.r
Nichia_LED_RECOM_dim.mspct.Rd

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/en/aralab-environmental-chambers/.

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)
#> Summary of source_mspct [8 x 1] object: Nichia_LED_RECOM_dim.mspct
#> # A tibble: 8 × 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 100pc    sourc… [1,4…         251.         899. <chr>              1 1s       
#> 2 75pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 3 66pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 4 50pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 5 33pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 6 25pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 7 20pc     sourc… [1,4…         251.         899. <chr>              1 1s       
#> 8 18pc     sourc… [1,4…         251.         899. <chr>              1 1s