There are a couple of threads on here dedicated to lighting you just need to do a little looking, but as for performance for a value price many people go with the taotronic dimmable LED's as they are strong enough to grow any corals and if you look around on eBay you can find them or similar models for @ $100 or a little more, I chose to spend a little more money and purchased the ones with built in digital timers that I found on amazon for $229, have had them on the tank about a month and some of my corals still haven't adjusted to them yet and I'm only running them at around 30% power with a consumption of @ 80 watts as opposed to my 6 bulb t5 ho unit that was consuming 254 watts, I've been nothing but pleased with these units but there are others out there to suit different tastes best thing to do is take your time and so your research, nothing good comes from rushing in