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Relay needed I have an 500 watt halogen light that I woul like to hook up to recidential (1/2 HP) garage door opener light socket. However, I am concerned since the light at the garage door opener is only a 60 watts. I think that a relay is needed between the garage opener and the Halogen light. Can someone please tell me the type of relay I need.

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Using OHMs law,your 60 watt bulp is presently drawing 1/2 amps and most light sockets are rated between 10 and 15 amps,so in theory, unless stated otherwise(usually because of excess heat) It would be able to carry the 3.34 amps of the 5000 watt bulb.  No relay wodl be needed. If you were to use a relay, and hook it to the existing light socket it would just be a 110v to 110 vold relay to run to a larger current (Amps) rated bulb socket. If you do that I would look for and obtain a 20 amp rated socket. An alternitive to the above is just to wire another light socket to a motion sensor switch ,which would turn on when movment was within the garage and turn off based up on your time setting.Both cheaper and less complicated that a relay.

Posted on Feb 23, 2009


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