The t5 is the uvb, the basking is for heat. You should have some kind of decor that Pogo can climb up on, place the basking directly over that decore. Pogo should like between 95 and 100 degrees temp in the basking. Try to situate the uvb so that it is on him in the basking area also. The uvb is needed so they produce vitamin d3 naturally, d3 is needed by their body to absorb calcium. It prevents metabolic bone disease. The basking is for food digestion, they can't process food correctly if they can't get up to temp. If you don't have room to make the light from each bulb overlap, you can setup 2 areas with decor and pogo should move between the two as needed. It's just less work for them if the light overlaps because they can get heat and uvb in one place. If you set up two different pieces of decor, make sure the distance between the top of the decor and the uvb is less than 15 inches.