Philips has taken this idea and posed the question, can we create 'natural' light?
Introducing the Philips OneSpace natural light emitting panel. A cheap, easily manufactured panel that can be fit to sizes up to 10x3m. It proves to be a real window into the future of dark spaces like subway carriages, basements, tunnels, hospitals and prisons.
So I expect you're all wondering ...how?
The light is transmmitted via white LEDs, incredibly cheap to manufacture. The light then light passes through a series of layers of plastic, separated by titanium oxide nanoparticles, which when excited mimic the characteristics of natural sunlight.
This may be the next in line as more and more fluorescent tubing is being phased out.