LFS had a sale 40% off everything. Saw an AI prime hd and grabbed it for $140 instead of 225. Wondering if this will work over a nuvo fusion 40. Usable space of tank is only 24" x 16" x 19". I think I read the prime hd is good for 24x24. But have seen people say it is only good for smaller tanks. Currently have an eBay reef breeders type led on my tank. It's just big and bulky and I know it is a lot more power then I need. Any advice would be great thanks!