i do have a UTH that's adjustable my temps right know are 92 hot and 83 cold humidity is 57 i use a basking bulb during the day and black light at night that way i can help keep temps up since it cold here ...... The ??? about the buld is what someone i know has done. i know that it wouldn't work for one/dangerous but i wanted other ppl opin on it that way i can relay info to him