i have a 5.5 gallon tank up with an AC 70 on it for water movement, and later added LR rubble. my heater is also in there. i built stairs out of eggcrate and zipties, and put a hunk of LR underneath them. i have the money for a 96 watt fixture to go on here, im just waiting for my mom to order the lights... ugh... taking too long but she promised to order them very soon i have a 15 watt strip light from an old 10 gal over the tank right now and i think its 15 watts. here are the pics