With the T8 and a 5.0 bulb you have to have the basking branch below the fixture 5 inches down from the screen with the fixture sitting directly on the cage top... This will make it so he rises up in the correct UVI Level. It will work for now... But you have to adjust the heat fixture up as well so he can not get within 9-10 inches of his casque (depending on wattage). Or locate the heat fixture in a different area that you move the T8 to and the branches for it.I do not have any near me. Would this stuff work for now?