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post #2 of (permalink) Old 09-27-2012, 06:30 PM
Monster Fish
Planted Tank Guru
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Join Date: Mar 2011
Location: Queens, NY
Posts: 3,213
Welcome to TPT! I suggest you read up on PAR since using watts to determine your lighting levels has become antiquated.

Here's the PAR thread:
Lighting an Aquarium with PAR instead of Watts

Also, orientation plays a big part on how much PAR your CFLs will emit. The same 26 watt bulb can be either low or high light, depending on how it's situated. Here's some more info:

PAR Data-Spiral Power Saver Bulbs, lighting question

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