Derek Uzzell Posted August 8, 2017 Share Posted August 8, 2017 747 - 2017-08-08 3:56 PM I bought the original COB LED lights and had heat related problems. I am now looking for another solution to fit into my Fluorescent fittings. I have sent off for the voltage regulators recommended by Alan and would be interested in the longer COB LED shown in one of Alans photos. Can I have a link to a supplier please... http://tinyurl.com/go7ss5b Link to comment Share on other sites More sharing options...
Len Salisbury Posted August 8, 2017 Share Posted August 8, 2017 Amazon mine is 17cm long but no Regulator. Link to comment Share on other sites More sharing options...
747 Posted August 8, 2017 Share Posted August 8, 2017 Derek Uzzell - 2017-08-08 6:45 PM 747 - 2017-08-08 3:56 PM I bought the original COB LED lights and had heat related problems. I am now looking for another solution to fit into my Fluorescent fittings. I have sent off for the voltage regulators recommended by Alan and would be interested in the longer COB LED shown in one of Alans photos. Can I have a link to a supplier please... http://tinyurl.com/go7ss5b Thanks Derek. The link works but I was unable to purchase, it must have timed out. I had a browse and found another one that could be suitable so I ordered two of them. It says 12 - 14 volts but I doubt that they are tolerant of 14 volts. They have an aluminium backing which might make a decent heatsink. I will test them first but reckon I will need the voltage regulators that I have ordered. Link to eBay Link to comment Share on other sites More sharing options...
Derek Uzzell Posted August 9, 2017 Share Posted August 9, 2017 There are lots of COB LED strips being marketed on-line at remarkably low prices and with (apparently) similar specifications http://tinyurl.com/ycew92o2 Many of those strips are advertised at being suitable for vehcle Daytime Running Lights and have pre-connected cabling for a 12V power supply. DRL applications would expose the strips to the vehicle alternator’s over-14V voltage, but there is nothing to suggest that the strips have any voltage regulation. However, as a DRL will be outside the vehicle, even if the LEDS heated up significantly that heat could radiate away. If used for interior lighting inside a motorhome - particularly if the COB LED strip is to be enclosed in a light fitting - heat build-up will have less opportunity to dissipate and adding a voltage regulator would always be wise. Aten Lighting’s website includes a caveat about unregulated 12V LED strips (not the COB variety) and offers a 10V-30V voltage regulator https://www.atenlighting.co.uk/inline-regulator.html Link to comment Share on other sites More sharing options...
747 Posted September 10, 2017 Share Posted September 10, 2017 Just reviving this thread to say I finally got round to fitting one of the longer COB LED lights I linked to a couple of posts earlier. They are a really good light and I am very happy with it. I bought 2 but only fitted one as I added a voltage regulator (as recommended by Alan earlier in this thread) to the 2 original COBs that Alan recommended. The original type are now running cool as is the long one. My batteries are topped up and I measured the voltage out of the regulator as 11.4 volts. I am not sure that I may have to adjust the voltage higher at some point as I am thinking if my batteries are a little run down, the regulated voltage might drop also, stopping them from working on low voltage. My original Fluorescent fittings have suffered a bit with heat problems. :D Luckily it is all hidden from view and should not occur again. Link to comment Share on other sites More sharing options...
John52 Posted September 11, 2017 Share Posted September 11, 2017 The performance of these panels has been brilliant whilst they were working. But without a voltage regulator they have only lasted a week or so, despite being mounted unenclosed for good heat dissipation. So I have gone back to LED strips (cheap off e-bay) - most of which are still going after 8 years without any voltage regulator. :-S Link to comment Share on other sites More sharing options...
Charles Posted September 11, 2017 Share Posted September 11, 2017 I'm not impressed with cob LEDs. Too much faffing about with regulators and heatsinks. The whole point of LEDs is efficiency not wasting current generating heat. Put the ones I bought to test away. I've got a cob head torch too the rechargeable batteries only last 2 hours, my other head torch with 5mm LEDs in lasts over 8 hours. They give a nice spread of light but that's all they've got going for them. Link to comment Share on other sites More sharing options...
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