That's the one.
Map will be based on this -
http://imgur.com/a/8iOvx
I had my idea then found out someone had done similar -
http://imgur.com/a/zNdB0
Mine isn't going to use an RGB strip. Just some bright white strips for each zone. PWM used to control brightness. Also going to use an LDR to control overall brightness as the RGB one does, so it's not blindingly bright in the dark.
Well, that's the plan, we'll see if I actually manage to sort it.
So far my prototype works for dimming a row of LEDs and using an LDR to change overall brightness, but that's just using regular PWM.