Replacing G4 socket + what do I need for LED G4 bulbs?

[OM2]

I bought some LED G4 bulbs to replace existing ones, 2 of which were gone.
I fitted on. It worked fine. I fitted another - the LED bulbs went dim. I fitted all - they all stayed dim.

Damn! I'm guessing it's to do with the transformer or something? I remember having the same problem with GU10 bulbs.

What can I replace with?
These lights are underneath cabinets in the kitchen.

LED strips lights would actually be good - but not sure about the wiring needed.

Maybe replace with GU10?? Or are these meant for ceilings?
Do we need the extra lighting for the cooking - it's just how the kitchen is arranged.

ELSE... should I replace like for like? How do I know the new socket will be OK for LED bulbs?

Not sure how to get the existing ones off!
Would like some advice on that.
See below for pic.

Thanks.

 

[flameport]

If you want to keep those things and use LED lamps in them, you will need one of these: https://www.screwfix.com/p/aurora-12-240v-constant-voltage-led-driver-16w/2107t

The existing one will be designed for halogen lamps and will have a minimum load, which the new LEDs are far below, hence they don't work properly.

For complete replacement, the round bezel prys off, and there will be a single screw inside fixing it to the cupboard above.
12V LED units can be connected to the existing wiring and a suitable driver, if you want 230V strips or similar, new wiring will be required.

 

[OM2]

@flameport Thanks for the reply.
Grrr.. no space for those blue long things - I think I would be better off going for complete replacement.

You said 12v LED units can be connected... assuming you mean G4 ones?
Can you send me a link? I searched Screwfix and can't find.

Thanks.

 

[Aragorn84]

The "blue long thing" must already exist somewhere. Perhaps on top of the cabinet.

G4 bulbs run on 12v, so there must be a transformer/driver somewhere that converts that from mains 240v down to 12v for the lights. You will need to swap that out for one thats compatible with LED's

 

[333rocky333]

Toolstation do a modern version in a kit form, if you can get to the old wiring,as you will need to replace the Transformer as there 24volt

https://www.toolstation.com/sensio-led-low-voltage-triangle-under-cabinet-light-24v/p30215