Energy saving LED lamps are great but I have experienced some pitfalls. Cheap lamps often flicker and fail regularly. Many operate at 12volts, the mains dropper unit does not rectify the output, poor lamps really flicker. You can now buy dimmable LEDs. great idea. I fitted them to a centre light fitting that had consumed 200watts halogen. The LEDs consumed 12watts. I fitted a LAP dimmer, advertised to operate at 5watts. It didn't, the best I could trim it gave just two positions, the lower one famously flickered. Since then I have read of many complaints, beware.