The PowerSun® UV is a self-ballasted mercury vapor lamp which emits UVA, UVB, and heat all in one lamp! Fits into a standard ceramic socket (No ballast needed).
Features include quality nickel-plated threads to prevent corrosion, and a full one year warranty!
Please remember these bulbs can NOT be used with a thermostat
It's was faulty
This is the 3rd bulb I've bought in 18years, they are long lasting, reliable and provide good heat to make my tortoise a happy boy. I'd recommend Internet reptile, really fast delivery, well packaged, will use again