I am using a brooder reflector with clamp. http://www.tractorsupply.com/webapp...10551_10001_50782_-1______?rFlag=true&cFlag=1
With this I use a 60 to 100 watt regular bulb. Depends on what kind of temps I am getting. If it is too hot I use a smaller watt bulb. You probably dont have to have the clamp as I just sit mine on the screen top with about 10" between the light and where my beardie basks.