Yes... Lighting can get pricey. I used LEDs on my 7 and 15 gallon. Bought the ballasts, heat sinks and LEDs off of eBay used PVC pipe for legs and aluminum foil for reflectors.
i built my own led fixture for about 50 bucks if i remember correctly. It was only on a 9 gallon but it did a good job of blasting the little tank. used rapidled.com parts and had 0 experience with this kind of thing, so if you're willing to try it out its a great and easy way to go to save a ton of cash.