thank you for the response. i know they get very hot " i ran 2x400 watt metal halides on my reef tank for several years" i understand the concept and what lighting could cause if done incorrectly. i just figured a 100 watt MV lamp, placed 12 inches above the top of my cage and have nothing go any higher up in the cage then 6 inches from the top..to put its closest distance at about 18 inches. i would check temps and what not of course and not just guess. but if it doesnt get to hot for my cham, why not? it would be the same price for me to do this and less replacing. like i said above i can get the 125 watt exo-terra one from my local pet store for 27 dollars. i cant beat that. i also figured MV would help with live plants more. thanks for your help i really appreciate it.