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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Price of LED lightbulbs
On Sat, 16 Mar 2019 15:22:55 +0000 (GMT), "Dave Plowman (News)"
wrote: In article , Scott wrote: It could well be the LEDs present too low a load for a SMPS to operate correctly. So you may need to swop it for one designed for LEDs. Or replace the fittings with similar ones designed for mains LEDs. Not really sure using a low volt SMPS designed for 12v tungsten plus and an extra one in the LED makes any sense. It might even be possible to convert the existing fittings. I was using a torroidal transformer, a long way from the radio. My research at the time suggested that the SMPS operating at 20x greater current (than mains voltage) was likely to be causing RF interference and as far as I can see that is what happened. Using the same torroidal transformer with halogen bulbs caused on difficulties. I now have mains voltage LED bulbs with no difficulty. I meant 'caused no difficulties'. Once again, the common factor was the 12 Volt LED bulbs. I blame them. Ah - right. Although probably just poor design. No reason I can think of why a 12v AC SMPS to drive a LED should be any different to a 240v AC one, interference wise. But I've not got any 12v LEDs here. Apparently it's because it is carrying 20 times more current. The bulbs were Philips so not the cheapest on the market. |
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