I think you really need a solar meter to measure the uvb output.. Those things put off crazy amounts of uvb, or atleast mine did. id stick with the linear 5.0uvb and a houshold bulb. if you need more heat id get a ceramic heat emitter imo. im sure someone with more experience with mercury vapor...
ive had lots escape. i always used to put a heating pad under a blanket in the middle of my living room floor and they would always be there in the morning but i live in a small house with not alot of places to hide. hope you find him