I bought 4 of each on Ebay. They were $17.50 for the 16W and $25 for the 30W, with free shipping if you bought a minimum of 4. If you do a search on Ebay you'll find them. The company was in Illinois. We put a 30W and a 16W in the living room, a 30W over the kitchen, a 30W over the dining area...