ok, you need to get one of these, the dial type are terribly and simply do not work.
These cost $12 at Walmart and will measure both the hot and cool side temperatures as well as humidity. You need a probed thermometer because UTH's do not affect the temperature of the air in the tank, and they are much more accurate.
Okay thanks for the info. Now should i just use the 50 watt fluorescent lamp 24/7? or should i use day during day n flu at night.