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PostPosted: Sun Feb 04, 2018 5:24 pm 
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Evenign all, just after a little help if possible.

In a new house It came with 24v Hafele LED felxible strip lighting under the kitchen cabinets. These are run by 2 seperate 24v 15w drivers. 1 driver is running the Hafele LED 3015 strip lighting in two sections of 75cm and 45cms. The other driver is just running a single strip of the same at 45cms long. On the specs is says the strip lighting is 15w per 1m if im reading it right.

I want to add the same lighting to the to of the cabinets. One side is around 150cms wide over 3 cuboards and the other side is a section 120cms and another 60cms.

So each driver would need to run the below.

Driver 1, 3 x sections of Hafele 3015 LED strip (15w per m, dont know Amps??) 1 x 45cms 1 x 75cms 1 x 130cms

Driver 2 3 x sections of Hefele 3015 LED strip (15w per m)1 x 45cms 1 x 50cms 1 x 110cms

Links below for the LED and Drivers

https://www.hafele.co.uk/en/product/led-flexible-strip-light-24-v-length-5000-mm-rated-ip20-loox-led-3015/000000450000630400040023/

https://www.hafele.co.uk/en/product/led-driver-24-v-for-1-6-lights-without-mains-lead-rated-ip-20-loox/000000ae0003d43900050023/#SearchParameter=&@QueryTerm=loox+24v+driver&@P.FF.followSearch=9610&PageNumber=1&OriginalPageSize=12&Position=7&OrigPos=3&ProductListSize=23&PDP=true

Thanks for your help in advance!!!
SO to work out the driver needed is is simply how many metres of LED strip x 15w? Why is some 2a and other 3.5a.

I'm just a complete novice and dont want to go blowing up the current drivers if they cant take all of the above which I dont think they can. They are wired direct to a single light switch in the kitchen.

Diagram of the current setup and wanting to run it all accross the tops too.

Also does anyone recognise if this is cool white or daylight?????


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PostPosted: Sun Feb 04, 2018 5:40 pm 
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JonnyWIlWil wrote:
SO to work out the driver needed is is simply how many metres of LED strip x 15w?

Yes. But bear in mind you should also add the amount that any driver is already supplying.


JonnyWIlWil wrote:
Why is some 2a and other 3.5a.

For the definitive answer, ask the company who are selling it, but a guess would be colour. (Warm white / cool white)


JonnyWIlWil wrote:
Also does anyone recognise if this is cool white or daylight?????

No idea, since what you are looking at may not be what the picture is showing, since most cameras do not give a true colour rendition.


Did you know there are other supplies of LED strip that will probably cost less than the ones you link to, I also note some items it says end of line, so when they fail you can't change them because they are (will) no longer be made.

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Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

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PostPosted: Sun Feb 04, 2018 5:48 pm 
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amp is easy to calculate

I = V over P

or

I = 24v over 15w

0.625 amp (peak)

It all depends how the led strips are constructed eg. parallel or serial strings use a multi meter to measure the resistance and also the current draw of the strips

Looking a the link for the tape it states 75w per 5000mm = 15w per meter

edit.

Cool white = bright light with a blueish hue
Daylight = not as harsh (think blue sky on a summers day)
Warm white = a yellow tinge to the white (think 60w old style light bulb)
If you want to fit cabinet lights you will need a power supply for them



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PostPosted: Sun Feb 04, 2018 7:53 pm 
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Thanks Someone else, I guess I kind of ask for some of those responses ;-)

Quick questions when you say "Yes. But bear in mind you should also add the amount that any driver is already supplying" how do you mean?

So am I right with the below thinking?

Driver 1, 3 x sections of Hafele 3015 LED strip (15w per m) = 1 x 45cms 1 x 75cms 1 x 130cms = 250cms = 2.5 x 15w = 37.5w driver min?

Driver 2 3 x sections of Hefele 3015 LED strip (15w per m) = 1 x 45cms 1 x 50cms 1 x 105cms = 200cms = 2 x 15w = 30w driver min?

I know plenty of other cheaper suppliers but as I alread had two drivers and half the strip lighting already and installed so it would have been better/ cheaper to just have been able to add the extra strip lighting. At least you have confirmered I would be way past the W capacity of the existing drivers so will need to replace them.

Thanks for the colour tone break down too Bob225! They have to be daylight then and 6000k in the hafele option then as not a hint of a blue hue, they just look pure white!

I will contact Hafele but I think they will only speak with Business/ Trade customers!! Found a couple of interior companies that have plenty of stock so can maybe seek their advice too.

Thanks again for all the responses and how quick they were too, been busting my head all day trying to work it out so thanks again!


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PostPosted: Sun Feb 04, 2018 9:34 pm 
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JonnyWIlWil wrote:
Quick questions when you say "Yes. But bear in mind you should also add the amount that any driver is already supplying" how do you mean?


Literally as I said.
If you have say 2m of LED strip and your driver can only supply enough for 3m of led strip, then at most you can only add 1 more metre of led strip because you already have 2m connected. (Bear in mind the figures I just made up as an example)

JonnyWIlWil wrote:
So am I right with the below thinking?

Driver 1, 3 x sections of Hafele 3015 LED strip (15w per m) = 1 x 45cms 1 x 75cms 1 x 130cms = 250cms = 2.5 x 15w = 37.5w driver min?

Driver 2 3 x sections of Hefele 3015 LED strip (15w per m) = 1 x 45cms 1 x 50cms 1 x 105cms = 200cms = 2 x 15w = [b]30w driver min?


Not quite.

Let us say your driver can supply 50w, and your LED strip uses 15w/metre.
You could quite happily connect 1m of LED strip to it and no problems, like wise it could be 2m or even 3m (In total) since 3m will only use 45w you can not connect 4m of LED strip as that will require 60w, which is 10w too much.

You only need to "worry" about the maximum watts, (don't exceed it) the minimum watts is not a problem.

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Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


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PostPosted: Sun Feb 04, 2018 9:37 pm 
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Just out of curiosity how much are these drivers? only I have just seen one that can run 8m of your led strip for less than £15.

(I use a 5v version from the same company to supply my LED pixels, no problem with it)

_________________
Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


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PostPosted: Sun Feb 04, 2018 9:42 pm 
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Thank you, that has cleared that all up for me. Very much appreciated!

Just found a right deal on ebay too, 1 x 5m of the 3015 LED Strip and 2 x 75w hafele 24v drivers and extra connector cabels too. The LED's are cool white 4000k but even if that is not the exact match its enough to replace the existing strips too!! All in £70 new and sealed so as long as thats the case its a bargain!!

Ill let you know and thanks again!!!!


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PostPosted: Sun Feb 04, 2018 9:50 pm 
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The Hafele drivers range from £14 for the 15W and up to £30 for the 75 or 90W ones.

Thats why the deal on ebay is so good as the 5m of 3015 strip used to retail at £110 before discontiued. Even if the drivers fail the replacements are all still compatible or so they say! Should still have 2m of strip left should any of that fail so fingers crossed it should last a good while.

See the same person one ebay selling 2 x 75w drivers and serveral connectors for £30 which is also a bargin, link below.

https://www.ebay.co.uk/itm/Hafele-loox-LED-Drive-24V-0-75W-and-Cables/222810758191?epid=2211943569&hash=item33e08e5c2f:g:~UsAAOSw~vpaJDH0

Also has one of the packs i got for £70, if its all good its a serious bargain!!

https://www.ebay.co.uk/itm/HAFELE-Loox-LED-Lighting/152827105670?hash=item2395349186:g:MzIAAOSweQBZnsO~


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