Homemade waterer heater

A few people have asked me how I made my heater. The first item is a utility pan 3.99 at tractor supply, then I used a scrap piece of metal or a board will do. Make sure it is a little larger than the pan. Then I used a 2 bulb lamp fixture, The one I used you can move the bulbs up and down to vary the heat so you can use it with a plastic or metal waterer, mount the fixture in the center on the bottom piece and then I used weather stripping under the edge of the pan, there is enough lip so you can use small screws to mount the top (pan) to the bottom. Chickens will peck at silicone that's why I didn't use it. The weather stripping will keep water from getting in if it is splashed or the waterer tips over.Total cost about 10.00.