G
glasgospark
any opinions ???
Discuss led lights on standard 12v transformers in the UK Electrical Forum area at ElectriciansForums.net
Ok lot of posts on this...12v transformers provide a variable current to 12v halogen lighting.....led drivers provided a set constant forward current to led lighting. now if you use a electronic or wire wound transformer, the leds will run to the max current limit, and usually burn out. By using a constant current driver we can limit this to the leds by usually using a 180ohm resister in each led fitting we can keep the current constant to the drivers limit. And the current will be constant to each led fitting....now voltage has no relevance here at all as long as it is above 1.2v per led or 12v above the light fittings multiply led arrangement ...so its output could be 50v and all would work fine
To be honest E54...some are not, as with the old electronic line systems, most manufactures make them on the limit especially in the what is supplied by China in uk ...the transformers are supplied in kits of say 3 x 50 watts with a 150watt rated transformer...right on the limit....you should always allow a least 25% or more greater wattage for heat dissapation and cool running....some led lighting especially Philips have internal bias which will run on old transformers which are really good units
Reply to led lights on standard 12v transformers in the UK Electrical Forum area at ElectriciansForums.net
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