In that enclosure is my 3 month old male beardy name Hillary. Recently I have moved him from his cramped 10 gallon tank to a 55 gallon tank, which I do not have a lid for. Instead, I'm using his old lid to hold his 160 watt Fluker's mercury vapor bulb and a 75 watt zoo med red bulb. (I know the color is not ideal, but my exo terra bulb stopped working after only 2 months of use). Anyways, a problem I am having is retaining heat in his enclosure so that it is above 88 degrees. I was just wondering if there was a simple way of fixing this problem, like simply replacing the red bulb. Thanks.