Old Bell & Howell and other projectors were famous for blowing out lamps. Most were only rated at 10 - 15 hours life expectancy. But when the lamp burns out what do you do? Pay top dollar for one of these old obsolete lamps? Let us help. Introducing the Tveden Lamp Modules DJL Plugin Module! This module that simply plugs in where the old DJL or DFN-DFC lamp came out of.... the socket! Everything is perfectly aligned and life expectancy is an incredible 170 HOURS!