I used to keep reptiles, and so know of the many sources for heating an enclosure. I still have my under-tank heaters (which heat the floor of a glass tank) and my ceramic bulbs (which radiate heat from above as a light bulb would, but produce no light.) Would either of these heat sources be appropriate for chicks? I thought the ceramic heating bulbs would be good as long as the chicks don't need more than natural light. Thanks!