Thomas Edison must be rolling over in his grave. Nikola Tesla is spinning in his. Yes, switch on the politics for the Battle the Bulb: The light bulb faces a government ban. Edison worked up a sweat to find a filament that would “burn†long enough to make electric light economical for households everywhere. A few decades later one of his employees came up with an even better filament, tungsten. Civilization has been lighting its nights and darker corners with light bulbs ever since. Genius may be x percent inspiration and y percent perspiration, but Edison’s x wasn’t the same...