The Planted Tank Forum - View Single Post - Lighting up a 25gal - please share experience
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Old 12-04-2003, 12:58 PM   #7
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some floro's put out more lumens/lux/par per watt. here is the best comparison and explanation i know of:

t5's(high output or compact floro's) and t8's will usually be more efficient than t12 or t12HO bulbs.

another example, i think, would be that larger versions of bulbs (say a 96W compact floro bulb, vs. a 36W or 55W) will be more efficient and produce more output for the watt.

also keep in mind a bulb's ability to be reflected and increased bulb temperature can drastically affect their output.

lot's of variables...
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