DJKoop
04-07-2007, 10:52 PM
This has to be the best info I have found yet on 250w MH bulbs. There may be similar charts for other wattages but this is what works for me.
http://www.reefkeeping.com/issues/2007-04/jb/index.php
http://www.reefkeeping.com/issues/2007-04/jb/index.php