... 3 mm.7. Lamp holder, GX53 lamp holder, surface mounted type, recessed type.8. Life span, 7,000 hours.LED GX53 lamps ... basic holder + ring. ring color, white, silver, gold.Type 3. Surface mounted type, Recessed type.COB LED GX53 lamps.1. Light source, COB LED ... material, Aluminum.10. Lamp holder OPTIONAL, GX53 lamp holder, surface mounted type, recessed type.11. Life span, 50,000 hours. ( function(){ var ...