Simply Conserve 14-Watt/32-Watt Equivalent 4 ft. Linear T8 Hybrid Type A/B LED Tube Light Bulb, Cool White Light 4000K (25-Pack) L14T8G40AB - The Home Depot
B&Q White GU4 Lampholder | DIY at B&Q
A Guide to Light Bulb Sizes, Types, Shapes, and Codes.
6 Pack G4 GX5.3 Lamp Holder Rectangular Porcelain Socket for MR16 MR11 LED CFL Halogen Bulbs with 6" Leads - Amazon.com