LED lighting , mains or LV

[ban-all-sheds]

Thank you but that has been established, would just prefer a simple reply without all the petty squabbling which seems to accompany any post in the electric forum.

Ask the mods to put a stop to Winston's nonsense then.

 

[winston1]

Ask the mods to put a stop to Winston's nonsense then.

What nonesense?

I would have thought you were the one who needs stopping. So many complaints on the threads to your attitude.

 

[flameport]

complete 1m strips and cannot be cut to suit wall length. Does anyone know if this applies to all mains led strips

Yes, for the reason in my other post here.
The only solution for those is to cut to the nearest whole meter longer than required, and fold the strip back at the end, or overlap both ends of the strip if it's around an entire room.

One benefit of this system is that if a section fails, you can cut the defective 1m section out and insert a new piece.

 

[JohnW2]

All pretty superfluous to my question.

You've had a 'short' answer to your question. The slightly longer answer is that, in some senses, one cannot "have it both ways".

You regard not having to have a ("bulky") driver as an advantage, which is fair enough. However, one of the prices one pays for that is that, if one has a very basic/crude apology for a driver/power supply (like the "rectifier cable"), it will produce essentially a fixed constant voltage, which means that it will only be suitable for running a specific number of LEDs, hence a fixed length of strip (60 LEDs in a 1 metre strip in the one you linked to). One therefore cannot cut the strip. since the 'voltage per LED' would then be wrong.

On the other hand, if one has a 'proper' ('constant current') LED driver (not necessarily all that 'bulky'), then it will adjust its voltage according to the number of LEDs being driven, so a strip connected to such a driver can usually be cut to any length one wants.

Kind Regards, John

 

[JohnW2]

It's accurately named, it's just a bridge rectifier in a plastic box. Output is rectified mains, and each 1m piece of the strip operates at that voltage, containing only resistors and a number of LEDs in series. The rectified mains is carried on two conductors which run the entire length of the 1m strip, allowing additional strips to be connected at the end, or longer strips to be cut at 1m intervals as required.

Fair enough.

Supplying 60 White LEDs in series from a fixed voltage source consisting of full-wave rectified 230V is probably not too bad, but I note that the linked product offers a range of colours, including red. Given that 60 red LEDs in series have a total of their forward voltages of only about 108V, a pretty substantial amount of heat would have to be dissipated in the current-limiting resistor in each 1m segment of the strip.

Kind Regards, John

 

[foxhole]

Ok will stay with 12v as need to fill the wall edge completely and 220v won’t do that.