I use T8s on all my tanks . I can get bulbs cheap online and they grow everything I have . I just use 6500k regular bulbs . I would like to get LED for the energy savings if nothing else , but just can not justify the cost right now . Too many other goodies I can buy as long as the T8s are working....lol I have mine in canopies and heat can be an issue . It is no problem on my 75 and 30 long but I have a weird shaped 25 that I had to add a PC fan to keep it at correct temp .