Depends on the size of the enclosure. My enclosure is 2x2x4 feet high. It lights up the whole thing, even the bottom of the enclosure is bright. Like I said, it really feels like a beam of sunlight shining through the top canopy. Make sure to arrange the plants so that the top canopy doesn't block the light from reaching the ground plants if you have them.What's the coverage like with the jungle dawns? If you have one, does it illuminate the whole cage? Or is there just one really bright spot?