It's pretty much impossible to light this tank evenly due to the aesthetic design of the hood. I would like to add another compact fluorescent but they don't have the directional ability of the LED's...
I found this 13W CFL at Walmart for $10. I couldn't find it on their website but here it is on Northern Tool:
http://www.northerntool.com/shop/too...9807_200309807
It comes apart easily and includes a 6500K bulb. You can use the clear plastic tube to protect the bulb and it even comes with a cap you can flip around and use to seal the tube from accidental splashes. There's also a decent reflector in there. This is an economical option you can purchase locally!