Yea I've been reading up on them I understand they are high wattage 150w +... and people say not to use them unless you have a uvb reader but is what I was getting at is I came across a 70w mercury vapor so I was wondering is that could be just right for a Cham considering I use 75w just for basking and if I could have less fixtures on the cage that would be good but it was just an idea so that's why I wanted to know if they were just bulbs from Home Depot or special bulbs like the rest