Simply put - they use less energy and save you money
LED lighting has already transformed commercial lighting and is coming to transform our homes, saving vast amounts of energy and resulting in substantially lower household bills. LEDs illuminate instantly, use around 90% less energy than traditional bulbs and have a long life of typically 25,000 hours.
Around 17% of electricity expenditure is on lighting. Changing just one traditional incandescent (standard) 60 watt light bulb, in use for 4 hours a day will save you upwards of £50 on your bill over five years; 10 bulbs = £500. After accounting for bulb and fitting costs it's still over £40 per bulb. A household changing ten bulbs should save at least £350 over five years. And this assumes electricity prices don't increase.
Savings are nearly as much when replacing halogen bulbs, which offer only around 10% improved efficiency compared with a standard bulb; they also use the old fashioned technology of heating up a wire to give off light. For many people, convenience is also a factor. LED bulbs last for typically 25,000 hours of use, far exceeding old technology. It makes changing bulbs an infrequent occurrence. This all makes so much sense that the Government is doing its bit by phasing out the sale of incandescent bulbs (nearly complete) with a broad range of halogens due to be phased out shortly.
NB - technical people call light bulbs 'lamps' and light fittings 'luminaires'. We'll stick with the term 'bulb' in this article.