MR16 GU5.3 Fitting Bi Pin Base Halogen Light Bulb Spot Light Replacement Ac Dc 24V Back Pin Lamp Bulbs for Boats, Yachts, Landscape Lighting or Any Low Volt Down Lights - Warm
What does BC mean on light bulbs? - Quora
B22 Bulb Cord Grip Lamp holder Light Bulb Fitting for Bayonet Mount Holder UK | eBay