The Planted Tank Forum - View Single Post - Metal halide or T5 H.O?
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post #12 of (permalink) Old 01-22-2012, 01:49 AM
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Energy used converted to light:

Incandescent/Halogen: 10% light
Metal Halide: 25% light
Flourescent: 70% light

There are more factors, but this is the basic concept.

LED Lighting Compendium
Originally Posted by Ludwig van Beethoven
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