Thread: Screw-in bulb or double ended bulb for a 150w metal halide ballast?
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Old 03-23-2007, 01:48 PM
Robw Robw is offline
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Here is a good read about ballasts and MH lights. Answered a lot of questions for me.

http://www.reefkeeping.com/issues/2007-03/sj/index.php
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