Source Four Zoom Lamp Sockets

Throughout the life of the incandescent Source Four, ETC has had to make a few changes to the components used in the Lamp Burner Assembly due to parts availability, so that some components will not be directly interchangeable with their current counterparts. 

As a result, if you have an older Source Four fixture and purchase a new lamp socket assembly (7060B7019 -UL OR 7060B7013 - CE) for the unit, the new sockets may not fit. In these cases, you will need to instead purchase a S4 Light Baffle Retrofit Kit (7060A2015  - UL or 7060A2215 - CE). That kit includes the new baffle, a new socket, and several other parts as one complete unit. Pictured below is the UL version of the kit. The CE version is identical except for wire color.

There's no single way of identifying which fixtures will need the baffle assembly, but all burner assemblies made after 2001  can use the current sockets without any issues.