Bayonet Cap Bulbs
Bayonet Cap Light Bulbs
Bayonet cap bulbs are the UK's standard light bulb fitting. Two small prongs on the slide of the bulb locate into L-shaped cut-outs in the light fitting. There are two common sizes, B22 (Large Bayonet Cap) and B15 (Small Bayonet Cap). LED bulbs are available in both B22 and B15 sizes and in a variety of shapes.