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Topic Title: LED lights
Topic Summary: Product knowedge assitance required
Created On: 12 July 2013 12:11 PM
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 12 July 2013 12:11 PM
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whjohnson

Posts: 862
Joined: 24 January 2009

Am presently on a job where the customer has 7 x GU10 fittings with Kosnic 5W LED dimmable lamps.

These are presently controlled from a single conventional light switch.

Customer has had a new kitchen fitted and wiring is present for 4 undercupboard lights.

Having checked, the wiring for the undercupboard lights is off the same switch as that for the ceiling lights.

Customer wants to fit single LED light fittings under the cupboards and wants to be able to swap the conventional light switch for a dimmer switch to control the lot.

I has asked around a few wholesalers but no seems to be able to advise further in terms of what is compatible with what - i.e. certain types of 'all in one' (LED lamp forms an integral part of the fitting) fittings would live happily with both the proposed dimmer and the existing retrofit GU10 LEDs.

Another suggestion has been to fit conventional tungsten lamps under the cupboards and retain the existing ceiling LEDs, but again, would the combination of a dimmer switch, the LEDs and e.g tungsten lamps all coexist happily together? Or do potentially expensive failures lie this way?

The bottom skirt (or 'pelmet') which runs along the underside of the cupboards has a depth of 50mm, so any suggested fitting would have to be less than 50mm thick in order to conceal it.

Am open to any hints/tips for suitable products would be most appreciated.

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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.
 12 July 2013 03:56 PM
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monk

Posts: 50
Joined: 08 December 2012

As far as dimming GU10 LEDs go, I've had only good results from a Varilight V-pro dimmer, and now use them wherever possible. They also work with the sealed LED units. Never tried them together on the same dimmer though, but I think if you're going to mix lights, this dimmer would be a good bet. Though I'd check to make sure any LED fitting is from a good manufacturer and is made to be dimmable
Good luck!

Edited: 12 October 2015 at 05:51 PM by monk
 12 July 2013 10:48 PM
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topmark

Posts: 156
Joined: 27 March 2009

flexible led ribbon would be ideal for your pelmet lighting.
can be made to length and looks very classy.
 13 July 2013 08:25 AM
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aligarjon

Posts: 3568
Joined: 09 September 2005

I had some feedback from a manufacturer via a supplier a while back and they reccommended the Varilite trailing edge dimmers as well. Different ones are better depending on total load. mine varied from 12w to 30w from memory as i needed 3 different switches.
The one i was reccommended was the Varilight V-Pro.
part no. JQP401W.
COST £12.50 INCL VAT

Gary

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Specialised Subject. The Bleedin Obvious. John Cleese
 13 July 2013 12:55 PM
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whjohnson

Posts: 862
Joined: 24 January 2009

Thanks guys,

This varilight dimmer sounds like a useful bit of kit.
The only problem is that it has to cosmetically match the rest of their new accessories which are Crabtree Platinum range items. Failing this, I suppose one solution might be to buy a Crabtree item and swap the varilight electronics bit over to a Crabtree front plate (screwless type).

In terms of LED strip, I've never fitted any. Does it come prewired with a mains lead? And can you get it with a 300k colur temp rating? Or is it all in that horrid cold blue light?

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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.
 13 July 2013 01:56 PM
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monk

Posts: 50
Joined: 08 December 2012

Varilight do a range of finishes :-) but yes, you can buy dimmer modules separately to save a few ££ and have a perfect match. I don't remember them being any bigger or smaller than normal modules, but it's worth checking
And strip LEDs will come in a range of colours too! Usually you'd get the driver and leads that will either clip into the driver or from strip to strip

// it is probably worth mentioning that I am not affiliated with varilight in any way!
 13 July 2013 05:39 PM
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topmark

Posts: 156
Joined: 27 March 2009

this isn't strip led,its a flexible ribbon.
u can order it with driver,complete with lead for direct connection to 240v.
comes in w/white,white or cool white
 07 January 2014 09:16 PM
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HarryJMacdonald

Posts: 409
Joined: 15 May 2002

LED strip is a good idea, though the stickiness of some of the stick on strips may need to be supplemented - read the buyers comments if you buy online.

I don't believe you can mix standard and LED lighting circuits from one dimmer switch. A standard dimmer needs about 20W to work properly so wouldn't like it if the normal lamp failed and only the LED were connected. Several of the websites selling LED lamps also give advice on which dimmers they recommend (and sell)
 08 January 2014 08:20 PM
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maltrefor

Posts: 125
Joined: 01 November 2009

Originally posted by: Danielciara

The LED lights saves electricity up to more than 30% that I had studies at http://www.LINK REMOVED.net.in/


It would help if the interpretation from Indian to English was spell checked before being released on their website!
 09 October 2015 04:13 PM
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Cremeegg

Posts: 622
Joined: 13 July 2007

I'd agree with the Varilight dimmers or Zano and as others have said you need to check the minimum loads that the dimmers will take. Yes I'd take the insides apart to get it to match.

Watch the start up current on some LED's they can start tripping B type breakers - Halers H2 limited to I think 16 per MCB. Other suppliers I haven't seen recommend a limit but worth giving their technical people a call.

I'd look at the rigid strips of LED's available as both flat strips and triangular strips to fit either behind the pelmet edge or between the wall and the cupboard. They come in 300mm, 500mm or 1000mm lengths, warm white or cool white and can be daisy chained together off one driver. I've also used colour changing LED strip so clients can set whatever colour they want - great for when they entertain the grandchildren.
 09 October 2015 04:54 PM
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aligarjon

Posts: 3568
Joined: 09 September 2005

It gets quite annoying reading through several posts then realise its 2 years old.

Gary

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Specialised Subject. The Bleedin Obvious. John Cleese
 09 October 2015 05:27 PM
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daveparry1

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Agreed Gary!
 10 October 2015 07:22 PM
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whjohnson

Posts: 862
Joined: 24 January 2009

Well, if it helps guys, I'll ask another question!

Am looking at direct replacement LED 5ft tubes to replace florescent items.

Do you have to remove the switchgear/ballasts etc before fitting the led tubes? Or can you just straight swap out?

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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.
 10 October 2015 07:31 PM
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mapj1

Posts: 6889
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Ah - well that depends on the make. If you choose the right ones you just unplug the starter and leave the old ballast in. Some others require you to almost rebuild the fitting.

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regards Mike
 10 October 2015 09:59 PM
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aligarjon

Posts: 3568
Joined: 09 September 2005

What are the LED tubes like in cold temperatures? i have had problems in beer cellars in the past with fluorescent, although i am thinking more of the garage in the winter.

Gary

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Specialised Subject. The Bleedin Obvious. John Cleese
 11 October 2015 01:24 AM
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whjohnson

Posts: 862
Joined: 24 January 2009

Funnily enough - a beer cellar is exactly where these might be going!

Years ago, I fitted a couple of 5ft anti-corrosives up there, but florescents don't like the quick on-off nature of use frequently found in beer cellars and domestic bathrooms!

So I thought I'd go for a couple of LED replacements but do not have enough product knowledge to make an informed judgement.

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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.
 11 October 2015 09:18 AM
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Zoomup

Posts: 2211
Joined: 20 February 2014

Originally posted by: topmark

flexible led ribbon would be ideal for your pelmet lighting.

can be made to length and looks very classy.


Yes it is very effective, and can be run via a controller to give various colours as well. But the self adhesive strip needs additional support as the glues becomes less effective after time, especially in a kitchen where heat and steam can unstick the strip.

Bye,

Z.
 11 October 2015 11:34 AM
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mapj1

Posts: 6889
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Generally, unless there are problems with moisture or condensation LEDs are far happier to run cool than warm. Unlike the old mercury tubes which need to be warm enough or the gas pressure falls and they struggle to strike-up. An old fashioned florry works best once the vapour inside the tube is a little above blood temperature.
No such limitation applies to LEDs, which in common with most semiconductors find high temperatures a life shortening experience, as gasses diffuse into the surfaces, and if badly over-run the doping chemicals move around. And the centre of the semiconductor itself, being crystalline, is surprisingly badly cooled, and many tens, and in some cases more that a hundred degrees hotter than the outer package.

-------------------------
regards Mike
 11 October 2015 06:41 PM
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napitprofessional

Posts: 451
Joined: 08 March 2008

Originally posted by: whjohnson

Funnily enough - a beer cellar is exactly where these might be going!



Years ago, I fitted a couple of 5ft anti-corrosives up there, but florescents don't like the quick on-off nature of use frequently found in beer cellars and domestic bathrooms!



So I thought I'd go for a couple of LED replacements but do not have enough product knowledge to make an informed judgement.


Just fit EFS 600 starters and away you go ....

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B. Eng (Hons) MIET
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