[APD] PUR-efficiencies for Philips QL

["Daniel Larsson" <defdac at hotmail_com>]

Mariano Fernández Bonfante said:
>>Here?s a link with the Philips QL.
>>http://www.kekon.hu/katalogus/fenyforras/catalog/products/5/5016/5016h.pdf

I'm afraid they have rather poor PUR-efficiency (around 0.49 microEinsteins
per
Joule) compared to better alternatives like Philips Aquarelle (around 0.8):
http://www.defblog.se/permalink/1402.html

It will grow plants just fine, as would any normal light bulb, but it will
require more
electricity to trigger the same growth-rates as more efficient lamps like
Philips
Aquarelle, Interpret Triton, Sylvania Aquastar and so on.

The PUR-efficiency is calculated with the following action-spectrum (B),
which
as you all see is for a *green* plant, thus the PUR-calculation will severly
penalize
yellow-green-bulbs:
http://www.cartage.org.lb/en/themes/Sciences/BotanicalSciences/PlantHormones/Nutrition/706.GIF


// Daniel.
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