LED strip lights

[catlad]

Hi there electrical people

I have a bit of an issue with my LED lights in my kitchen, they are taking ages to light up
and when I tried to investigate a bit I found the transformer was very hot.
can anybody offer any advice please.

 

[333rocky333]

Is this led strip, if so maybe too long and possibly overloading the "Transformer"
Was all the bits brought as a compatible package and are you trying to dim them

 

[catlad]

Thanks for the reply 333
its a sort of strip/ribbon of Led lights that came on a roll
They worked fine for the first 6 months now they are taking
longer and longer to come on ie. now takes approx 20 min.
No it was not a set a friend fitted them for me.

 

[bernardgreen]

a bit I found the transformer was very hot.

A picture of the label on the "transformer" would help to diagnose the problem.

longer and longer to come on ie. now takes approx 20 min.

is it 20 minutes before there is any light or is there some light ( dim or flickery ) as soon as you switch on which then increases over 20 minutes ?

 

[ericmark]

As said too hot normally equals overload, there are many reasons for overload from faulty installation to LED's going short circuit. So some history please. Did they ever work OK, what type of LED package, tape, spot light, and is the power supply voltage regulated or current regulated AC output or DC, the more you tell us the higher chance we have to work it out.

For VA x Power Factor Correction = watts since Power Factor correction is normally unity you can consider VA = Watts so look for VA marked on the power supply this should be higher than the total watts of the bulbs or strips.

 

[catlad]

Hopefully there is a picture of the transformer.

 

[ericmark]

OK you answered while I was writing, I suspect the power supply has been overloaded and has been damaged as a result, but before jumping have you any info on the strip normally watts per meter, and how does this compare with what is written on the power supply.

 

[ericmark]

OK power supply 120 watt so what is the strip rating.

 

[winston1]

It is highly unlikely the LED strip is anywhere near 10 amps or 120 watts. It would like a floodlight if it was.

My guess is a faulty AC/DC adapter, possibly caused by a short, but unlikely as these units are usually short circuit protected. With the strips disconnected you could test the adapter with a small car bulb.

 

[catlad]

Thanks for the replies
I will try and find out the rating of the strip led lights.
The lights do not respond when you turn them on at all
until they have been switched on for about 20mins.

 

[catlad]

Hi guys
Just letting you know I got a new ac/dc adapter
and everything is working ok now.