Integral LED retrofit GU10 bulbs produce the same amount of light as equivalent halogen spotlight bulbs while using only 15% of the energy. Therefore, instead of using 35-50W of power, a GU10 LED bulb will only use only 4-8W. LED bulbs last more than 10 times longer too, so you save even more. In a room with 8 GU10 bulbs you can save more than £54 per year on energy. Start saving as soon as you install them.