Try your local Wal-Mart or other mega-mart. They have some nice 35W CFL bulbs that replace the 135W regular bulbs. They will fit into normal household bulb fittings. These babies put out some real nice light. We found ours that were 2000 lumens and 6500K, perfect for seedlings and getting started. They were about 8-9 dollars each. Also try your local hardware stores, too. Good luck to you!

Peace

Tha Rooster