The LIFX is a Wi-Fi enabled LED bulb that can be easily controlled from your tablet or smartphone. The app is free and available from the Google Play Store as well as the Apple Apps Store.
You can dim or brighten the bulb as well as turn it off or on using the app. If you replace all your bulbs in a room with them you can change the brightness of the whole room. Not only can you adjust the brightness but you can change the colour of the light(s) too. The ability to adjust the lights remotely means no more fumbling in the dark looking for the light switch and will be especially helpful now the mornings and evenings are beginning to get darker.