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Re: [APD] PUR-efficiencies for Philips QL

How useful is par values ?  Would a 30w bulb with a 0.60 value be
equivalent to 2 30w bulbs with 0.30 value ?

Looking at the link http://www.defblog.se/permalink/1402.html

Could one use high PUR low lumen bulbs like the SERA Deep-sea to
produce a tank were the plants believe its a high light tank and the
fish believe its a low light tank ?

Then the discus would be happy because its dark and the plants are
happy because its light. ;)

according to the table :
SERA Deep-sea 36watt with 300lm and  0.77 microEinsteins per Joule.

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