I would also be aiming a bit higher for the temp. Around 100 F is usually the goal, however 99-101 is usually fine. The humidity that I have always used and have always seen recommended for the first 18 days is about 50 % then increase to around75 % or so.
I'm using a 40watt candle looking bulb I will turn the water heater temp up a bit But I did put a psc of soda can behind the water heater temp and it did make my water wiggler and inside temp even out. I just cut a psc of soda can worked awsome just be careful and wear gloves very sharp!! I also rolled the sides in so nobody would get cut, a hammer and a edge of a rock or table works good to roll the edge under