Check with your local Power company for Energy Incentives/Rebates for switching over to LED lighting. Most power companies offer incentives to switch to CFL's----ask them why not LED's? As they consume even less energy. Link is an example from BC Hydro in Canada.
LEDcentre.uk.com provides quality LED lights with two years warranty shipped anywhere in the UK. The lights are available in strip, G4, MR16, GU10, B22 and many other forms.