Hello everyone new to this website. So I’ve had a beardie for about 4 months now would say he’s about 6 months. My lamp already went out so I switched to a 160w all in one bulb and every since my dragon has been basking with his eyes closed and doesn’t seem to be very active he was fine before then and also had a 160 watt bulb that came with the tank. He’s currently in a 40 gallon 36x18x18. From what I’ve read I do need to go with a t5 5.0 or 10.0 tube bulb but should I place it inside or outside? His basking spot is 12 inches from the top of his screen. Any advance will be appreciated