Aug 20, 2014 #1 B bjledbetter Well-Known Member View Badges Joined Feb 3, 2012 Messages 576 Reaction score 7 Location Tennessee Rating - 0% 0 0 0 Will a 400w metal halide be enough light to keep haddoni mags/ acros going in a 4 ft 150?
Aug 20, 2014 #2 ReeferEric Resident Reef Junky View Badges Photo of the Month Joined Jan 27, 2012 Messages 1,490 Reaction score 355 Location Miramar, FL Rating - 0% 0 0 0 If its just one light... I would say no. 400w MH is serious business in a good reflector.
Aug 21, 2014 #3 Reefing Madness Moderator View Badges Staff member Super Moderator Ultimate Member Excellence Award Hospitality Award Joined Oct 27, 2012 Messages 20,033 Reaction score 7,291 Location Peoria, AZ. Rating - 0% 0 0 0 It would be able to keep them in one spot in the tank, yea. It won't cover the whole tank though.