I recommend a 3,000,000 candle power spotlight. Just aim it downward on the tank it'll look great. J/k anyway There are plenty of t5's and t8's that look great as well and way cheaper. LEDs you have more options with colors so you can customize the settings to your liking. I also think that LEDs have a tendency to have a shorter shelf life than claimed. Individual diodes may go bad but you'll still have plenty of light overall. There are give and take to both sides but in the long run its personal preference. PS I think LEDs are still pretty sweet.