I'm wondering if anyone can offer me some advice relating to a John Lewis Cormack light fitting with a faulty Hytec LED driver (pic attached).

I've tried replacing with a similar 24v 24w LED driver https://www.amazon.co.uk/gp/product/B01HQ9G164/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Although the integrated LED lights now come on they are very dim, yet when I turn the power off they flash bright very briefly.

Would welcome any suggestions!

Both seem a similar spec; either new unit is faulty or the wiring to/from is incorrect or damaged. (any signs of melted insulation? )

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Verwood Handyman

Verwood Handyman


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Thanks for your message - no sign of melted insulation, there's only 4 x 5w lamps so the 24w capacity of the driver should be fine.

Someone else is our resident "expert" on all things regards LED drivers and similar. (someone-else is actually his user name... I'm not fobbing you off) Hopefully he'll cast his expert eye over this thread.

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Verwood Handyman

Verwood Handyman


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That's very kind of you wine~O , but I wouldn't say I am "an expert"

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Bazingaa, I have to ask, what makes you say the driver has failed? more to the point what happens if you take one of the LED lamps out, do the remainder come on bright? (You could also try taking them all out, and putting them back one at a time)

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I did some experiments with LED's and found if over driven they still worked, but a lot dimmer, so it is possible the LED's have been damaged by the old faulty driver. Only real way to know if power supply or lights is to measure the voltage while lights are on. Are they getting 24 volt?