are you using a heat pad? it sounds like maybe you should go the heat pad route instead of using the lights. lights really suck out all of the humidity. if you need to use a light in addition to the heating pad, i would just use the red light. cover the top in saran wrap or contact paper and cut a hole just big enough for your lamp with the red bulb in it. you can also try the diy humid hide and/or humidifier.