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View Full Version : MH vs HQI

reefdogg1107
02/12/2008, 06:48 PM
What is the difference???
bertoni
02/12/2008, 07:00 PM
Umm, HQI originally was a trademark for a brand of metal halide bulbs. Hobbyists use HQI to refer to double-ended bulbs. The double-ended bulbs are just a different physical form for the same technology.
bertoni
02/12/2008, 07:01 PM
http://reefkeeping.com/issues/2007-03/sj/index.php

That article might help.