LED lighting any advice appreciated thanks

I was hoping someone can give me some advice on LED lighting. We recently got our bathroom renovated and during the process we put cabling in for lighting my other half wanted. This cabling is 5amp lighting cable connected to spur boxes and finally back to an RCD at the mains box. A separate switch on the wall plate controls this. It was supposed to be a different type of lighting but my good lady has changed her mind

We have 2 alcoves (square boxes recessed in the tiles) with one cable coming from each

We have another spur box below the wash hand vanity unit which is to get lights under it and a cable where a large wall mirror is mounted for lights around it.

The remit is 2 boxes lit, under vanity unit and round mirror lit. I have a few questions I really hope some could help answer a few questions please

1: I’m not sure what wattage of lights to buy, but it’ll be a subtle light she’ll want and warm white
2: Will this set up require 4 drivers
3: Can I retrofit my existing 5amp cable to take LEDs. I think they all come with their own connectors removing some of my 5amp will be tricky as it’s behind bath etc. It’ll drop but not sure about
Feeding newer cable through. Plus I’m not sure how long the cable comes on the LED lights.

4: Not sure the best place to get these, a reputable dealer or recommendation wouldn't go amiss.

Tjhank you JD

1) I'm not sure either. It's subjective, it depends on what level of light output you want, what colour the room it, how it's layed out, the spectrum of light output from the lamp, etc, etc. It's largely trial and error. A good yard stick would be to think about what you had previously and if you want more or less than that. Might also be a good idea to look at the light output in Lumins rather than the power input in Watts, since different lamps give more light output per Watt.

2) The driver will have a minimum and maximum load, you need to make sure that the total load is between those two values. With LEDs, that might well mean making suer you hit the minimum load. It might also be worth getting extra drivers instead of running extra cable. Again, that's your call.

3) The cable doesn't really care what's attached to it. Just make sure the load is <= 5A, which I make around 60W (assuming 12V), which for LED light output is, to use a technical term, ****loads.

4) Me neither. It depends what you want. Different places will stock different kit. Decide what you want, then look where sells it.

5) It would be advisable to take a look at the regulations regarding electricity in bathrooms, there's a whole load of stuff it covers and you really do want to be sure that you haven't missed anything

6) Another option is to get some quotes from an electrician and make all of this Somebody Else's Problem (SEP).

Although a LED may have a lumen value there are a number of facts which mean these values are only a rough guide.

Take a 3W candle bulb and a 3W spot lamp both with 250lm and mount them so the light is directed to a dark coloured floor or to light coloured ceiling and the difference is huge.

Even where it states 60 degs you may find 70% of light within a 30 deg arc and the edges are really quite dark.

Tale an 11W CFL with BA22d fitting and likely around 600lm but with a PL11 fitting 900lm as bright as many LED's.

I have decided all you can do is get lights which if they don't work where you first put them at least can be fitted else where.

Thanks for your responses, these are not actually to produce any great light but more subtle (left on) proving a soft glow more a feature than practical. The bathroom already has plenty of ceiling light. It's just so difficult to determine what wattage to buy. LEDs kits are quite expensive so making a mistake means you can't really fit them anywhere else. It looks like trail and error seems the way forward. I was hoping that folks on the forum would have had experience of this type of set up and could guide me in the right direction.. thanks again for the responses it is greatly appreciated.