The Planted Tank Forum - View Single Post - Why is there no sticky differentiating all these different Lighting Systems???
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Old 09-09-2005, 10:27 PM   #9
Matak
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For the spiral compact, is that total output lumens, (including all that restrike loss in the spiral) or is that usable lumens (as measrured from the outside of the bulb)?
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Steve

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