175 Watt Mercury Vapor Light Fixture And Bulb – The caps that sit on the foundation of a light bulb are just as important as the bulb themselves. True, those tiny metal fixtures may seem fairly insignificant given their size but their importance is that they dictate which bulbs may be fitted to which light fixtures. Without the ideal cap, the space, alleyway, stairwell or backyard will stay in the dark.
With the selection of lights that can be found in the marketplace nowadays, there are quite definite specifications to make sure that the ideal bulb is fitted. By way of example, both pin, or bi-pin, the cap on certain lights can only be put into bi-pin light sockets, therefore gu10 LED bulbs cannot be placed in a light socket which is not designed for your gu10 cap. However, there is more than 1 kind of bi-pin cap, together with the cap on g9 halogen bulbs considerably different in design and appearance, and used exclusively with certain types of halogen bulbs.
The reason for a cap would be to allow electrical contact between the electrical supply and the light itself, without even leaving wiring and electronic aspects exposed. The metal pins make direct contact with the electricity supply, allowing the electricity to flow through the filament, producing the essential energy to create the light to glow and supply the necessary illumination.
The full selection of caps is extensive, but they are sometimes broken down into three main kinds, namely the bayonet, the Edison screw and the bi-pin. |} Bayonet Cap That is potentially the most identifiable cap and is more often than not found on the ordinary incandescent bulb selection for domestic lights, though energy saving lights also contain this cap to allow easy change over to counter house lighting.
The design is a simple vertical cap at the bottom of the bulb with two ears, or small pins, protruding from the side. Both of these pins lock into slots in the side of the socket, to hold the bulb in place. The title bayonet is derived in the thrust and spin action that’s necessary to fit them.