http://ag.arizona.edu/ceac/sites/ag....20Lighting.pdf
The most interesting part of this paper is at the bottom of page 5, box on left titled: "End-of-day FR Light Treatment for Cucurbit Seedlings Grown under Artificial Lighting"
Only 30 minutes per day of far red (>700 nm) produced a significant increase in size. I have been think of adding far red lighting to my solarium to use end-of-day far red lighting to produce artificially long nights.
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http://www.lighting.philips.com/pwc_..._module-en.pdf
Philips is a large lighting and LED manufacturer. This data sheet is interesting in that it gives photon flux for their LED modules in micromoles of photons per second.
I wish that I could find some values of photon flux for linear fluorescent lamps given in micromoles per second.
Philips claims that their LED modules reduce energy consumption "up to 60%" compared to T8 linear fluorescent lamps. That would make their LED modules up 2.5 times as effective as T8 fluorescent, so 100 watts of fluorescent lighting could be replaced with as little as 40 watts of the Philips LED modules. To get this 2.5 times as effective figure you would have to be using their Deep Red only modules; notice that the photon flux for Deep Red modules is 1.79 micromoles per watt-second while for mixed Deep Red/Blue it is 1.56 micromoles per watt-second.
---------- Post added at 08:54 AM ---------- Previous post was at 08:46 AM ----------
http://amebse.nchu.edu.tw/documents/...on%20model.pdf
This paper gives photon flux densities in a growth chamber using fluorescent lamps but this paper is not interested in lighting efficiency; the lamps do not seem to have any reflector.
Various interesting links about lighting.
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