thanks reptilemadd, after checking my own setup it would appear that a 150w bulb is slightly wider and longer than the 100w bulb, which is a bit of a pain in the .....
i just need to figure out a way round the problem now
1.0.0 Lesser - Helios 2.0.0 Normal - George & Kairo 1.0.0 Mojave - Bolt 0.1.0 Mojave - Roxi 1.0.0 Leopard Gecko - Leo 0.0.1 Crocodile gecko - Pheonix