low voltage lighting

13 Oct 2007
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United Kingdom
Right, I've got a low voltage light fitting with inbuilt transformer. It has 4 bulbs (max 20w). I keep reading about these new led bulbs which fit mr11/mr16 but no one seems to know if they are completely interchangeable.

So, do you know if you can replace all 4 with led's?
Or can you just replace 2 with led's and fit 2 with 20w?
Wouldnt the transformer be damaged if insufficient wattage was drawn from the supply? Hm.
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If the LEDs are sold as a direct replacement for the MR11 & MR16 lamps and the fitting has an electronic transformer I can't see a problem with changing them individually.

If it's a cheap wound transformer and you only replace 2 lamps you may over volt the other 2 which will shorten their life.

You may also run into problems if the existing light is connected to a dimmer.
Thanks for your reply.
No, I havent fitted a dimmer,what with it being low voltage.

You mentioned cheap transformers. Is price a good guide? Or are there any special words I should look out for when buying one in the future?
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In case you should care, installation of an ELV lighting system anywhere, if it's not a pre-assembled CE-marked kit, is notifiable...

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