I agree with tossing the lamp, but do you now have a regulated under tank heater? She does need some form of heat and I don't recall reading about you having an uth. Also, 50% is not too dry for a BP who is not in shed. Humidity should be 50-60% while not in shed and bumped up to around 70% during shed. Hopefully she'll start to eat for you, just keep trying appropriately sized live mice. Give her about 5 days to settle into her new enclosure before offering food again though. If mice do not work, see if you can find so African Soft Furred rats.