I am literally so excited I cannot contain myself.
I found this at John Lewis just now. Its an LED lightbulb that goes in a normal lightbulb socket and has a remote control to change the colour. You can set it to scroll through the colours and change the brightness. Ridiculously excited.
It costs £23 but LED light bulbs last years and the colour changing lights cost over £100. This is soooo much better.
DS loves it. I just need to hide the remote!!