LIFTMASTER Garage Door Openers 175C147 Light Socket Light bulb socket for LiftMaster Chamberlain Garage Master, and Searsgarage door openers. LiftMaster Chamberlain low profile screw drive garage door opener models 2110, 2220, PD420, PD460-2, 9950, 9960, and 7902 (all models may not be listed).