Aquarium keeping is getting more technical, but there are some good options for low tech tank keepers. Cheap and easy option most people don’t know about. T-2 Florescent lighting. No not T-12/T-8/T-5. Watt per Watt, T-2s have more Lumans than the other Florescent lighting. Great for plants, corals, or just appeal.

http://www.youtube.com/watch?v=D5FRx5xKOyM