Welcome to the forum Paul. I'm glad you decided to introduce yourself.
I'm not the one to help you on filtration because I use sponges. My favorite light is the Finnex Vivid because it brings out the colors of the colors of the fish. It is a moderately expensive light. There are much fancier ones that cost more that I don't know about.
People who can answer your questions will be along soon.
BTW, where in the UK do you live?