Power Advice

Hi

I am in UK & need some 12v power adapters for WS2815 lights. Need watts from 40 -140W for different light runs. Can anyone recommend any power adapters please? I have looked on Aliexpress and they do not deliver the ones ive checked out to the UK.

Also what would be the implications if I got 100w adapter but only need 40W?

Thank you :-)