ok, everyone is talking MH lighting, i've used halides in the past for other reasons and am very interested in how you cool the area....ive always used a cool tube with 500 cfm fan and duct to remove the heat from the area...but when you are dealing with a fish tank you also are trying to make the area above it look kinda nice, MH, especially 250 and above put out some serious heat, so what do you do for cooling?