Hello, I am tweaking my enclosure lighting right now. All the 150 watt bulbs I buy do not last very long and I cannot afford to buy a $15 bulb every 2 weeks. So I am trying to add multiple bulbs for his heating. I have 2 125watt bulbs on right now and his temperature is at 84 degrees Farenhieght. I do not know what heat set up is the best or what to use. Any advice would be helpful. My tank is 4ft by 2ft by 2 ft. Thank you