Pack of 2) E26/E27 to GU24 Adapter Converter - E26/E27 Edison Screw to GU24 Bayonet Base Bulb Socket - - Amazon.com
OMNILUX Sockel GU-10 (Kabel 15 cm): Amazon.co.uk
SUNLITE 1w MR16 GU10 Base 18LEDs Yellow Bulb - Led Household Light Bulbs - Amazon.com
UltraPro Keyless Porcelain Lampholder, 2 Pack, Medium Base, Indoor Lighting, Mount on 3-1/4” or 4” Box, 250VAC/660W, UL Listed, White, 54600 - - Amazon.com