I use regular white light bulbs from 2 feet above. That off with 100 watts and go down as they need less of it. A little warning about the large 250W red bulbs. Not only do they use a lot of wattage then can pose risks. They can and will explode if they get water splashed onto them. They can also set bedding on fire. Plus they tend to burn out so much faster. You can also get one of the ceramic heat disks from the pet store. They sell them with the lizzards and snakes. They are pretty safe. No need for red light, like for some other birds. Ducks prefer blue lights, not red.