i am going to get one of these two lights unless someone can tell me something else to get. it has to be compack because my tank is in a tight place not to much over head clearance. i was thinking either a Current USA Satellite Dual w/Lunar Light 20" 2x40W or a Coralife 20 Inch Aqualight With 1-96W 50/50 4-Tube Square Pin Base (with fans). both looked good to me but the coralife has 16 more watts and probably a better cooling system. but the other seems to have better lunar lighting. what should i do?