Led Light Bulbs Sizes – The caps that sit on the foundation of a light bulb are equally as crucial as the bulb themselves. True, those tiny metal fittings may seem fairly insignificant due to their size but their importance is that they dictate that bulbs may be fitted to that light fittings. Without the right cap, the room, alleyway, stairwell or bathtub will stay in the dark.
With the selection of lights that can be found on the market today, there are very definite specifications to ensure that the right bulb is fitted. For example, both pin, or bi-pin, the cap on some lights can only be placed in bi-pin light sockets, so gu10 LED bulbs cannot be set in a light socket that isn’t meant for your gu10 cap. However, there is more than 1 type of bi-pin cap, together with the cap on g9 halogen bulbs considerably different in appearance and design, and used only with particular kinds of light bulbs.
The main reason for a cap would be to allow electrical contact between the electrical supply and the light itself, without even leaving wiring and electronic elements vulnerable. The metallic pins make direct contact with the electricity supply, allowing the electricity to flow through the filament, creating the necessary energy to cause the light to shine and provide the necessary illumination.
The full selection of caps is extensive, but they can be divided up into three principal kinds, namely the bayonet, the Edison screw and the bi-pin. |} Bayonet Cap This is potentially the most recognizable cap and is more often than not discovered on the normal incandescent bulbs selection for domestic lights, though energy saving lights also feature this cap to allow easy change over to counter house lighting.
The layout is a simple vertical cap at the bottom of the bulb with 2 ears, or tiny pins, protruding from the side. These two pins lock in the side of the socket, to hold the bulb in place. The name bayonet comes in the thrust and twist action that is necessary to match them.