Prompt delivery, good information throughout and competitive pricing make National Lamps an excellent supplier. I purchsed 4 GU10 LED bulbs, which should last me 10+ years (25,000 hours), and the total of 26 watts (4 @ 6.5wt each) replaces the 200 watts (4 @ 50wt) of the Halogen bulbs I previouslty used in this fitting but the lights are brighter @ around 450 lumens each. So I will save 174 watts per hour on my energy bill for 25,000 hours, i.e around £435 over the life of these bulbs that cost me £16 delivered. This is a no-brainer and I will look to replace my remaining non-LED bulbs with LEDs to make even greater savings. David