As long as it is the right spectrum, it should work. On a 4ft tank, you should have 2 MH
's though. A 4ft, 12" deep tank is different. Would be nice.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,