photobiologyLamps-package {photobiologyLamps}

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 [e-mail] (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]