Some of you fellow constructors might have already planned and built something similar, but I would like to add your suggestions /ideas.

Few months ago I noticed quite neat ambient led-lighting solution for gaming and thought that this would be pretty cool when installed inside the cockpit.
Teste Philips GOLD 21:9 + Celular LG Optimus 3D - YouTube

At least in our Cessna-sim ( Cessna172sim - YouTube ) it is often a problem to have enought outdoor ambient 'nature' lighting. The video looks quite promising, especially the dusk and dawn colors would be awesome.