Im having trouble getting my cham's basking spot to 85-95. It stays at 80 degrees. It is 5 inches down from the 100 watt basking bulb. Is it safer to get a 150 watt bulb rather than move her basking area up to only 3 inches below the bulb? Im not sure what to do to raise the temp. I know most people can get it to ideal temps with 60 to 100 watt bulbs. I have an all screen 24x24x48.