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Author: Subject: Electrical experts on LED's please!
MikeRJ

posted on 31/5/13 at 10:08 AM Reply With Quote
quote:
Originally posted by russbost
Just had a thought about the LED driver/transformer, the existing transformer is AC & the G4 LED's have what looks like a diode/rectifier across the pins, so are those bulbs going to work with a dc supply? Is it a simple matter that they will work only if connected the correct way round?

Why is nothing ever dead simple???


Sorry for late response, but all the G4 LED lamps I have seen use a bridge rectifier on the input so the polarity of the lamp holder doesn't matter.

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DarrenW

posted on 3/6/13 at 04:34 PM Reply With Quote
quote:
Originally posted by RedAvon
Keeping the transformer and potentially a resistor is just wasting power - I would ditch the transformer, hard wire the lamp units to 240V and buy 240v led lamps.

Ian




Depends on where the LEDS are being fitted. Defo not a good idea if the LEDs are in zone 1. Ive got a load of energy wasting 12V downlighters under my kitchen cupboards. Im pretty sure fitting 240V LED's would contravene 17th edition wiring regs (i did 16th many moons ago so would have to look it up to be sure, something about how far away the lamps are from a water source - ie sink and tap.).

Safer advice would be that if 12V lamps are used, then continue to use same voltage with correct power source.

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