LED bulbs are the best choice for the traditional round bulbs – either in a bayonet fitting or screw fitting.
LED bulbs are great for spotlights. There’s lots of choice, including bright bulbs that match or exceed the light levels of halogen bulbs. We recommend the GU10 spotlights. They’re the ones that go in with a push and twist and are 240V.
There’s not quite as much saving for MR16, but still worth doing. They have 2 pins that just push in, no twist, and they have a ‘driver’ that reduces the voltage to 12V. With MR16 the LED bulbs do not offer the same output-for-wattage rating. The driver might also have to be replaced by an electrician.
Lots of choice here, too. Newer, brighter bulbs have become available at affordable prices. We have seen light levels match that of halogen. When recently trialling three of the Philips 6W Master LED Candle in a three-bulb candelabra, we found the light levels very bright.
Many other types of LED fittings can be found, too. You should find an LED equivalent for most bulbs around the house.