Here's some other easy ways you can lighten your bill:
Turn off any lights you don’t need. But do make sure you have enough lighting on stairs and hallways.
Keep your lampshades and bulbs clean. They give out less light if they are dirty. Darker lampshades give out less light, so use lighter shades to make the most of the energy.
Fit lower wattage bulbs wherever possible.
Spotlights can be more expensive to run than other lighting, so avoid leaving them on for a long time.
Fluorescent tubes give out more light and are the best choice for kitchens.
Think about buying fittings designed for low-energy lights.
Fit timers and automatic sensors to lights, especially outside lighting. This will save you money.
In most homes, lighting accounts for around 20%–25% of the electricity bill. A substantial amount of the energy needed for lighting could be saved by replacing ordinary lamps with compact fluorescent lamps (CFLs) – aka “energy saving light bulbs”. OK so they may be more expensive to buy than normal tungsten lamps, but CFLs last up to 10 times longer. So for each one you fit, you could save up to £7 a year or £60 over the bulb’s lifetime.
Plus because they use less than a quarter of the energy of traditional bulbs to create the same amount of light, energy saving light bulbs come in much lower wattages.