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d2dave
19th December 2024, 12:19 PM
Not sure if this is the correct spot for this but I had a look through all the categories and could not find a suitable place. Mods move if you wish.

I wish to add some mood lighting to my back patio. I have a total length of 15 metres I want to use.

I have ordered 3 x 5 metre lengths of RGB cob strips. These are 24 volts and are rated at 24to 28 watts a metre.

So each 5 metre strip will require, assuming the higher rating of 28 watts M, 140 watts of power or 5.8 amps.

I have done a lot of searching and I am finding different opinions.

Some say to join them all together and run a power supply from each end,
others say power from one end but it has been suggested that if powered from one end the other end will start to dim off

The best suggestion is to power all three separately. My problem is I have no roof cavity to run wires.

With the cob strips I can start and finish the run where the patio roof meets the house roof where I can then hide the power supply/s

I also need a controller to be able to change the light color.

Anyone had any experience with this stuff?

mrs
19th December 2024, 01:02 PM
As a sparky I would say, try powering one from one end on the bench and see for yourself whether it gets dimmer on the other end, I would suspect not

Red90
20th December 2024, 12:54 AM
Are you sure that is real wattage and not equivalent wattage? That would be a very large amount of light if real wattage.

d2dave
28th December 2024, 10:51 PM
What do you mean by equivalent wattage?

d2dave
28th December 2024, 10:54 PM
As a sparky I would say, try powering one from one end on the bench and see for yourself whether it gets dimmer on the other end, I would suspect not

The problem is that I don't yet have a power supply for these.

One of the reasons for my original post was to determine whether I need to buy one large power supply or two or three smaller ones.

Red90
29th December 2024, 12:00 AM
What do you mean by equivalent wattage?

With LEDs, they typically put the equivalent wattage that an incandescent light uses to produce the same amount of light. Make sure you are reading the actual wattage. The numbers quoted would be a very large amount of light.