This Long form Fire rated Downlight is suitable for ANY Bulb technology (halogen, CFL, or LED), whether it's a long or standard length Lamp. Additionally you can lay insulation material on top of the fitting guard. It also comes fitted with a GU10 lamp holder and includes an MR16 Lamp holder for convenient choice of bulb type. A truly great product which solves all your specification and installation needs in 1 fell swoop. Choose /30 for Warm White and /40 for Cool White lamps.