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[Snakeaholic]

dont bother misting it unless its shedding. if the enclosure is kept @ a really high humidity the snake can actually get sick. as for getting something to measure the humidity with - don't bother.

I usually keep the warm end of my coastals enclosure @ around 35 C which means the average temp of the whole enclosure is around 28-30 C. Take into account though that different snakes have different requirements - im not exactly shure that the temperatures for a coastal would be the same as for a jungle.
i would recommend that as long as the snake cant make contat with the lamp and you have a thermostat that any sort of heating lamp would be fine - dont bother with the UV lams and all that fancy stuff, you only really need that kind of stuff for lizards