In this picture she’s about 10-12 inches from it (you can see one of the ends of her fixture to the top right). I got some industrial strength Velcro to stick it to the side of the tank so she can get enough of it. Her basking bulb is also hanging lower now. I initially planned on having a basking platform but she’s pretty weak right now and I didn’t want her to have to work to get to a good basking spot.