to build a better light bulb

Why are we still stuck on a light-bulb, and connected to the grid? We can have light in our door and window frames, light in the walls and from the floors, light in the chairs and desks and yes, lamps and chandeliers if/when we want them. Some can be battery-run, the batteries in turn charged by the grid or solar. About a half of world's lighting can be taken off the peak hours and all nukes can be shut down (if there were a world market in electricity).

Companies strive to build a better (more expensive) light bulb

www.washingtonpost.com

Legislation that will require more energy-efficient light bulbs is prompting the world’s major lighting companies to create more expensive versions.