I am not sure, I know they have not been changed from what they came with from the factory. I can not imagine that there are too many different wattage for the xenon lights. One suggestion that was sent my way was to use the silicon used for potholders and cut it to fit between the base of the light and the air gap. I have not tried it but it may work. Someone suggested using a 1/2" air gap but that is not practical as you do not want the light hanging below the cabinets.