dontpanic42: I haven't been keeping up with this thread recently, and can't really be bothered trawling through 27 pages (did do a quick search which netted nothing), so I?apologise?if this?has?already been mentioned.
Admittedly, it's a pretty damn expensive light bulb, but it looks like it could have some interesting applications.
Not that expensive really if you were looking at putting in some kind of lighting control system anyway.
I've also seen some led fittings that run on power over Ethernet so can be installed by anybody, no need for an electrician.
Since each light fitting will be on your network they too can be controlled from your smartphone.