Leviton 3-Way Socket Lamp Holder R50-07090-0PG - The Home Depot
Toplimit 3 in 1 Standard LED Light Bulb Lamp Socket Adapter Splitter Heat-resistant PBT E26 and E27 86V-240V Light Socket Splitter - Amazon.com
Wholesale GU5.3 MR11 MR16 G4 Lamp Holder Converter E27 T5 T8 2G11 Lamp Base E40 E14 B22 Light Socket Adapter US EU Plug For LED From m.alibaba.com
863 Lampholder,bw 866l 18945-1 ,bw 865l 18942-1,bw863 Bw866 Bulb Base,gx5.3 Bw 865 L Gu5.3 Gz6.35 Lamp Socket With Lever - Lamp Bases - AliExpress
Triple Head Conversion Lampholder, Led Bulb Base E27 Lamp Holder Converter E27 Socket Splitter Lamp Adapter Lampholder For Home Office(1pcs, White) | Fruugo NO
USHIO | 1004025 | S-221 | iQLighting
LH0598 E26 medium base triple lamp holder/socket with top and bottom IPS nipple mounting and 11" leads