i have a 10gal tank with two hid spots, one on each side. and a big water bowl in the middle. i just started using the lamp because ambient temperature was like 78 when only using the under tank heat mat. ive been misting the tank and that brings it up to like 60% humidity but that only last for like an hour and then it drops big time again, to about 35-40%. really not sure what i should do.