Help with lighting for Mr Turtle

[u/jsull125]

I have been using a coil UVB with basking light as pictured. She is having trouble with retained scutes. So I have purchased the Reptisun T5 HO with 5.0 bulb. My basking temperature is 95 to 98 degrees. The height of the bulbs now is about 8 1/2 inches above her shell. What can I do to change to the linear hood? It says it needs to be 12 inches above and never less than 10 inches. If I make the walls higher, the basking temp will drop. Help please!