Bathroom Light Keeps Dimming

[DodgyBathroomLight]

Hello

We have a light in a windowless bathroom that dims within a few minutes of being turned on.

The light is one of those light cum extractor fans; the extractor fan continues to work once the light dims.

Sometimes the light flashes or flickers before dimming, sometimes not. Sometimes it stays on 5-10 minutes before dimming, sometimes it dims after 30 seconds. If you turn it off and on again, the light either turns on and dims quickly or is dim from the offset.

We've changed the bulb (GU5.3 / MR16) to no avail, but at a loss as to what to try next.

I've attached some pictures to show the change in brightness - the dim light is abiut the brightness of a mobile phone screen.

Any ideas?

Thanks!

is it an extra-low voltage lamp, running off a transformer?

post a pic please as I see nothing.

Is it a dimmable light switch with a non-dimmable bulb fitted?

Thanks for your replies.

I can't seem to upload the pics but hopefully this will work - freeimage.host/i/3E7ZOv

No idea re transformer. It was fitted in 2003 & no problems until now, it probably started playing up about a year ago.

Also, just a bog standard clicky light switch, not a dimmer switch.

Thanks again

i can't make out what type it is. Some of those combined units are not much good.

I'd suspect a poor connection, either in the switch or in the unit. if there is a transformer that complicates it.

If you turn off the light, and take a flash photo, I might recognise it.

I would be thinking of replacing it with new. Modern LED lamps last much longer. Do you know what the duct is like? Do you remove it by giving the surround a quarter-turn?

Is it directly above a bath or a shower tray? What is the height of the ceiling above the floor? (these are relevant if you replace it)