Have swapped energy supplier to Utility Warehouse, they replaced every bulb in the house for LEDs, and when they break will replace for free. Had to have their telephone line and broadband also, but we are definitely saving. Oops I forgot it comes with a sort of 'credit card' which you put money on and when you spend it it in certain shops (there are a lot, Sainsbury's, Debenhams, Boots to name a few) you get money back, which is a form of saving if you were going to use these shops anyway.