Energy usage comparison for lights

I created this page when writing a post for my blog, in order to be able to compare the energy usage and running cost of three different types of downlighter type lights, Halogen, Compact Fluorescent Lamps (CFL) and LEDs. You can change the following parameters: number of bulbs, unit cost per bulb, lifespan of bulb in hours (if known, I have set typical values as the defaults here), power consumption rating of bulb, average number of hours per day the light is switched on, and the cost per kWh of electricity supplied (the default value I have set here is based on my last bill, this has probably gone up since then). Then press the Update button to calculate the comparison of energy use and costs, and if you would like to reset to the default values at any time press the Reset button.

So as you can see from the figures above, using low energy lighting in your home really can save you money! If you need a calculator to work out any extra figures, try this one.