Anyone know anything about those spiral UVB lights? Ya know what I'm talking about? They're like a fluorescent tube, but its in a corkscrew shape and goes in an incandescent socket. A friend was asking about reptile lighting and those came up, but I don't really know much about them. Like how often do they need to be replaced? How close/far away from the reptile can they be? What's the UV output? Anybody ever try them?