GU10 Ceramic Lamp holder - 20 pack £8.49 (Prime) / £12.48 (non Prime) Sold by abalando GmbH and Fulfilled by Amazon - HotUKDeals
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GU10 Ceramic Lamp holder - 20 pack £8.49 (Prime) / £12.48 (non Prime) Sold by abalando GmbH and Fulfilled by Amazon

£8.49 @ Amazon
Useful if you're swapping out MR16 downlights to GU10. Cheapest I've found @ 42p/holder. I've got 50 MR16 Aurora downlight which need swapping over to GU10 so I can replace the bulbs with LED bulbs… Read More
Mentos Avatar
1m, 3w agoFound 1 month, 3 weeks ago
Useful if you're swapping out MR16 downlights to GU10. Cheapest I've found @ 42p/holder.

I've got 50 MR16 Aurora downlight which need swapping over to GU10 so I can replace the bulbs with LED bulbs. Fortunately the downlight come with a decent connection box/etc so I just need the lamp holder and tails.

Thought i'd post this in case anyone else is in the same position.

Before you buy, pull down and check your existing downlight to ensure:

1) Make sure you can pull out the transformer not just the fitting. In my case the Aurora downlights came with individual transformers and I ensured the electrician wired them so all could be pulled out. However, on older installs sometimes theres just one transformer, or the electrician hasn't thought to wire the transformer(s) so they can be removed.

2) The transformer is not wired directly to the MR16 lamp holder. Since you'll be removing the transformer, if this is the case you'll need something like this instead: GU10 Lamp holder

3) The existing connection/junction box is suitable for mains voltage connection. Some cheaper MR16 downlights don't, as the connections after the transformer are low voltage.

4) If you have a dimmer check the min load and also that its trailing edge (presuming you're doing this to switch from Halogen to LED lamps).

If anyone has found a cheaper alternative I'm all ears :)
Mentos Avatar
1m, 3w agoFound 1 month, 3 weeks ago
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(26) Jump to unreadPost a comment
Comments/page:
#1
Great, shall check them out, we need to replace loads in our kitchen. I think it's a great price. Thanks for post!
1 Like #2
If you need 50 the same seller has them for £17.95 (36p each)
#3
I thought you can get MR16 LEDs?
#4
20 x GU10 Lamp Holder Mains Base Connector Downlighter Fitting UK supplier bulb

£7.75/20 - bought yesterday

http://www.ebay.co.uk/itm/201825840368?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
#5
Are the majority or MR16 lamps not 12 volts so its not just a case of changing the lamp holder to GU10 as most GU10 are 240v you'll also need to remove the transformer.
#6
And the casings are not usually earthed on the MR16 lamp holders so you need to add an earth
#7
jameshalinson
I thought you can get MR16 LEDs?
You can. They do cost a little more than equivalent GU10s, but not much.
#8
robsprocket
If you need 50 the same seller has them for £17.95 (36p each)

Thanks for that, hadn't spotted that :)

Edited By: Mentos on Mar 06, 2017 10:37
#9
Yes also the 12v for MR16 means you can't just put in 'normal' GU10s
#10
paulj48
Are the majority or MR16 lamps not 12 volts so its not just a case of changing the lamp holder to GU10 as most GU10 are 240v you'll also need to remove the transformer.

Yes, I've made the OP a bit clearer to explain this. Also even if you're swapping to MR16 LED's you'll often need to change the transformer as it won't meet the minimum load.
#11
deanos
And the casings are not usually earthed on the MR16 lamp holders so you need to add an earth

I did mention to check the rest of the holder is suitable. In my case fortunately it is, I guess Aurora use the same arm/junction box.
#12
Scorpion
jameshalinson
I thought you can get MR16 LEDs?
You can. They do cost a little more than equivalent GU10s, but not much.

I'd need to change the transformer as LED lamps wouldn't meet the minimum load rating.

Also I've been keeping an eye on LED downlight deals and the MR16's seem to be a lot more. Haven't seen any dimmable ones for ~£1 mark, yet the GU10's seem to pop up quite often
#13
bought some along time ago from ebay, but the wires were heat insulated. Which I thought was a good idea.



Edited By: AzeemB on Mar 06, 2017 10:56
#14
MR16 LEDs can be had for £1 on Ebay

Note that not all transformers will work with them though
#15
jameshalinson
MR16 LEDs can be had for £1 on Ebay
Note that not all transformers will work with them though

If you have a single transformer, then theres a chance they will. If like me you have individual transformers its highly unlikely unless you rewire so only one transformer is in place driving multiple lamps.

I appreciate the pointer about eBay, but to be honest I prefer to buy somewhere reputable so its easier returns. And also with that many bulbs I want to ensure some consistency across them. Just seems to me GU10 is the way to go going forward.
#16
paulj48
Are the majority or MR16 lamps not 12 volts so its not just a case of changing the lamp holder to GU10 as most GU10 are 240v you'll also need to remove the transformer.

MR16 are low voltage lights normally 12/24 v maximum voltage is 120 v for MR16
Cannot be used at 240 v
#17
Mentos
jameshalinson
MR16 LEDs can be had for £1 on Ebay
Note that not all transformers will work with them though
If you have a single transformer, then theres a chance they will. If like me you have individual transformers its highly unlikely unless you rewire so only one transformer is in place driving multiple lamps.
I appreciate the pointer about eBay, but to be honest I prefer to buy somewhere reputable so its easier returns. And also with that many bulbs I want to ensure some consistency across them. Just seems to me GU10 is the way to go going forward.

I am confused - lol

Are you saying they will work with a single Transformer setup?
#18
Where are you getting 12v GU10 bulbs from?
#19
shinds
Mentos
jameshalinson
MR16 LEDs can be had for £1 on Ebay
Note that not all transformers will work with them though
If you have a single transformer, then theres a chance they will. If like me you have individual transformers its highly unlikely unless you rewire so only one transformer is in place driving multiple lamps.
I appreciate the pointer about eBay, but to be honest I prefer to buy somewhere reputable so its easier returns. And also with that many bulbs I want to ensure some consistency across them. Just seems to me GU10 is the way to go going forward.
I am confused - lol
Are you saying they will work with a single Transformer setup?

Essentially MR16 are low voltage (12V), whereas your mains in the UK is 240V. So you require a transformer between the light and mains (same principle as you're phone charger, which is likely 5V). (Sorry if I'm teaching you to suck eggs, but not sure how much info you need).

If you have multiple downlights in a single room (quite likely as the beam spread is far lower then traditional pendant type light) there are two options:

1) You can have single transformer, which is wired to the mains on one side and then to all the lights on the other. I.E one transformer powers all the lights (similar to a multiport USB charger). This is often the case in cheaper/older installs as the the cost of transformers used to be higher (before the Chinese production monster dropped prices to peanuts).

2) You can have one transformer per light. So mains cable runs to each light position, this is wired to the transformer and this is wired to the light fitting. So if you have 6 lights in a room, you'll have 6 transformers.

If you look on the transformer you will see it has a minimum load rating (you can google why this is the case, but its inherent in the way transformers work). As we know LED lamps draw much less power then traditional Halogen lamps (that is after all why we are changing to them). So if you swap out a Halogen Lamp for an LED lamp the concern is it will draw less power then the transformers minimum load rating. The result will be the light won't work as the transformer won't step up to deliver power to the light.

If you have setup (2) like me, its very likely a single LED lamp (as each light fitting has one transformer) won't meet the transformers minimum load rating.

If you have setup (1), then the transformer is driving multiple lights. Therefore added together they may meet the transformers minimum load rating.

You could rewire from setup (2) to setup (1). But if you're asking this question, I wouldn't recommend it. You wouldn't want to make a mistake and send 240V to a low voltage lamp by mistake. Also even if you do know what you're doing it can be a tad fiddly as you can't access/see all the wiring in the ceiling void. You'll have to pull all the lights down, disconnect the transformers, disconnect the switch and buzz out the wiring to figure out where the transformer should sit.

Hope that helps.

Also a secondary point, if you have a dimmer, it may be prudent to check its minimum load rating as you may end up in a similar problem.
#20
jameshalinson
Where are you getting 12v GU10 bulbs from?

Not sure if you're asking me?

I'm not getting 12V GU10 bulbs, they don't exist. Thats the point of having the different fitting, to ensure someone doesnt mistakenly plug the wrong bulb in.

I'm planning to buy the new Lamp holders on this deal, swap out the MR16 Lamp holders (and remove transformers), then use dimmable GU10 bulbs. My lighting will no longer be low voltage.

Edited By: Mentos on Mar 06, 2017 12:36
#21
Mentos
shinds
Mentos
jameshalinson
MR16 LEDs can be had for £1 on Ebay
Note that not all transformers will work with them though
If you have a single transformer, then theres a chance they will. If like me you have individual transformers its highly unlikely unless you rewire so only one transformer is in place driving multiple lamps.
I appreciate the pointer about eBay, but to be honest I prefer to buy somewhere reputable so its easier returns. And also with that many bulbs I want to ensure some consistency across them. Just seems to me GU10 is the way to go going forward.
I am confused - lol
Are you saying they will work with a single Transformer setup?
Essentially MR16 are low voltage (12V), whereas your mains in the UK is 240V. So you require a transformer between the light and mains (same principle as you're phone charger, which is likely 5V). (Sorry if I'm teaching you to suck eggs, but not sure how much info you need).
If you have multiple downlights in a single room (quite likely as the beam spread is far lower then traditional pendant type light) there are two options:
1) You can have single transformer, which is wired to the mains on one side and then to all the lights on the other. I.E one transformer powers all the lights (similar to a multiport USB charger). This is often the case in cheaper/older installs as the the cost of transformers used to be higher (before the Chinese production monster dropped prices to peanuts).
2) You can have one transformer per light. So mains cable runs to each light position, this is wired to the transformer and this is wired to the light fitting. So if you have 6 lights in a room, you'll have 6 transformers.
If you look on the transformer you will see it has a minimum load rating (you can google why this is the case, but its inherent in the way transformers work). As we know LED lamps draw much less power then traditional Halogen lamps (that is after all why we are changing to them). So if you swap out a Halogen Lamp for an LED lamp the concern is it will draw less power then the transformers minimum load rating. The result will be the light won't work as the transformer won't step up to deliver power to the light.
If you have setup (2) like me, its very likely a single LED lamp (as each light fitting has one transformer) won't meet the transformers minimum load rating.
If you have setup (1), then the transformer is driving multiple lights. Therefore added together they may meet the transformers minimum load rating.
You could rewire from setup (2) to setup (1). But if you're asking this question, I wouldn't recommend it. You wouldn't want to make a mistake and send 240V to a low voltage lamp by mistake. Also even if you do know what you're doing it can be a tad fiddly as you can't access/see all the wiring in the ceiling void. You'll have to pull all the lights down, disconnect the transformers, disconnect the switch and buzz out the wiring to figure out where the transformer should sit.
Hope that helps.
Also a secondary point, if you have a dimmer, it may be prudent to check its minimum load rating as you may end up in a similar problem.

Thanks for the detailed reply! :) Much appreciated.

ok - So here is my dilemma.

I have setup 2 (One transformer per light) and I replaced the 50w MR16 Halogen bulbs for LED ones. Everything worked fine for almost a year but now they have started to flicker?

So I don't know what to do?

Should I:

a) Change the LED bulbs as they are no good?
b) Get rid of the transformers and stick in GU10 bulbs? (But then that means a lot more work and re-wiring)
c) Change the light Switch (i.e. get rid of the dimmer and fit a normal one)?

Thanks!
#22
shinds
Mentos
shinds
Mentos
jameshalinson
MR16 LEDs can be had for £1 on Ebay
Note that not all transformers will work with them though
If you have a single transformer, then theres a chance they will. If like me you have individual transformers its highly unlikely unless you rewire so only one transformer is in place driving multiple lamps.
I appreciate the pointer about eBay, but to be honest I prefer to buy somewhere reputable so its easier returns. And also with that many bulbs I want to ensure some consistency across them. Just seems to me GU10 is the way to go going forward.
I am confused - lol
Are you saying they will work with a single Transformer setup?
Essentially MR16 are low voltage (12V), whereas your mains in the UK is 240V. So you require a transformer between the light and mains (same principle as you're phone charger, which is likely 5V). (Sorry if I'm teaching you to suck eggs, but not sure how much info you need).
If you have multiple downlights in a single room (quite likely as the beam spread is far lower then traditional pendant type light) there are two options:
1) You can have single transformer, which is wired to the mains on one side and then to all the lights on the other. I.E one transformer powers all the lights (similar to a multiport USB charger). This is often the case in cheaper/older installs as the the cost of transformers used to be higher (before the Chinese production monster dropped prices to peanuts).
2) You can have one transformer per light. So mains cable runs to each light position, this is wired to the transformer and this is wired to the light fitting. So if you have 6 lights in a room, you'll have 6 transformers.
If you look on the transformer you will see it has a minimum load rating (you can google why this is the case, but its inherent in the way transformers work). As we know LED lamps draw much less power then traditional Halogen lamps (that is after all why we are changing to them). So if you swap out a Halogen Lamp for an LED lamp the concern is it will draw less power then the transformers minimum load rating. The result will be the light won't work as the transformer won't step up to deliver power to the light.
If you have setup (2) like me, its very likely a single LED lamp (as each light fitting has one transformer) won't meet the transformers minimum load rating.
If you have setup (1), then the transformer is driving multiple lights. Therefore added together they may meet the transformers minimum load rating.
You could rewire from setup (2) to setup (1). But if you're asking this question, I wouldn't recommend it. You wouldn't want to make a mistake and send 240V to a low voltage lamp by mistake. Also even if you do know what you're doing it can be a tad fiddly as you can't access/see all the wiring in the ceiling void. You'll have to pull all the lights down, disconnect the transformers, disconnect the switch and buzz out the wiring to figure out where the transformer should sit.
Hope that helps.
Also a secondary point, if you have a dimmer, it may be prudent to check its minimum load rating as you may end up in a similar problem.
Thanks for the detailed reply! :) Much appreciated.
ok - So here is my dilemma.
I have setup 2 (One transformer per light) and I replaced the 50w MR16 Halogen bulbs for LED ones. Everything worked fine for almost a year but now they have started to flicker?
So I don't know what to do?
Should I:
a) Change the LED bulbs as they are no good?
b) Get rid of the transformers and stick in GU10 bulbs? (But then that means a lot more work and re-wiring)
c) Change the light Switch (i.e. get rid of the dimmer and fit a normal one)?
Thanks!

If you only have two lights theres minimal work removing the transformers and changing the lamp holder. In fact you could probably just look for a deal and replace the entire fitting. In my case I have 50 of them so it would be quite costly.

However, if the bulbs worked for a year, perhaps you could try getting replacements from the manufacturer. Or buy a couple and try them, you could always return them if they don't. It would be the easiest route.

It could also be an issue with your dimmer, but you'll only find that out when you replace the bulbs.

I would just take it step by step, change bulb, if thats doesn't work change the switch.

Having said all of that, its issues like yours that lead to me want to remove the transformers and just switch over to GU10 now. I bought Aurora 2 kits (reasonable brand versus cheapest option) originally to try and avoid constantly popping lights. The original bulbs/transformers all still going strong 5 years in. WRT LED lamps the general consensus seems to be the GU10's are more reliable (although MR16's are much better these days) and more readily available at good prices. If I only had a couple of lights I'd probably grab the cheapest MR16 LED's. But with 50 lights I think its best to move to the best possible solutions for the long term.


Edited By: Mentos on Mar 06, 2017 15:29: .
1 Like #23
Mentos
The original bulbs/transformers all still going strong 5 years in. WRT LED lamps the general consensus seems to be the GU10's are more reliable (although MR16's are much better these days) and more readily available at good prices. If I only had a couple of lights I'd probably grab the cheapest MR16 LED's. But with 50 lights I think its best to move to the best possible solutions for the long term.
My experience (and I have about 30 mixed MR16's and some converted to GU10's in my house) is the MR'16 seem to burn out/corrode on the pins compared to GU10's. I cant change some on my lamps to LED as they're a square lamp MR16 and I also have some MR16's that are smaller than the average lamp as well, again I've never found LED's that will fit those.
#24
paulj48
Mentos
The original bulbs/transformers all still going strong 5 years in. WRT LED lamps the general consensus seems to be the GU10's are more reliable (although MR16's are much better these days) and more readily available at good prices. If I only had a couple of lights I'd probably grab the cheapest MR16 LED's. But with 50 lights I think its best to move to the best possible solutions for the long term.
My experience (and I have about 30 mixed MR16's and some converted to GU10's in my house) is the MR'16 seem to burn out/corrode on the pins compared to GU10's. I cant change some on my lamps to LED as they're a square lamp MR16 and I also have some MR16's that are smaller than the average lamp as well, again I've never found LED's that will fit those.

I've suffered the corrosion issue on a couple of my bathroom spotlights. Those were cheaper ones I'd bought. The Aurora lights have all been fine fortunately.

For the bathroom I plan to stick with MR16 low voltage. But i'll keep an eye out for a clearance somewhere as I'll need to change the transformers aswell :/ Got 10 to change, so hopefully a good deal will pop up.
1 Like #25
1 Like #26
RealDash

Thanks, that's even better :) Farnell are decent company too.

Edited By: Mentos on Mar 07, 2017 07:34

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