Gosh Im trying but I cant overlap them! This screen opens across the front and back instead of left and right sides. The dome bulb fixture takes up the whole width of the back screen and my basking temps are perfect. I just cant afford to buy another heat lamp right now because Im paying for a custom tank as soon as it is in and done. That tank will be a dubia front opening with bkth lights correctly mounted inside. An exotic reptile store owner is coming to my house to set it all up for me. But it isnt ready yet. Could take a month because he is doing me a huge favor. Ive already paid for a third of the price of this. Will a side by side setup work for now? He can go back and forth. Im gonna get a solarmeter too but thats another $240! The t5 10.0 hogh output is new, bought less than a month ago I cant angle the uvb because my tank width is only 18.5 and the light is 24" and the dome lamp for heat is BIG. This all happened because I bought a 75 gallon AQUARIUM instead of terrarium. It is 4 ft long, 21.5 tall and 18.5 wide. Ugh. The new one when it comes will be 4x2x2, dubia enclosure.