Thomas Alva Edison didn’t invent the light bulb. But, in 1880, he made electric light practical by developing an incandescent bulb that burned for 1,200 hours. That’s history. And, it’s unimportant. Actually, it’s important. Very important. Just not important here. Humans are fickle. Someone devises something. People love it. Someone makes it better. People abandon the old for the new. This cycle repeats and repeats. Then, a future someone says, “Hey, remember that old thing a bunch of old things ago, that looked cool. Let’s bring that back.”  And, we do. Edison light bulbs have resurfaced. And, they are justifiably in vogue. Each bulb has an intricate filament structure, such as “square cage” and “quad loop.” They emit a soft, warm light.  Compared to ordinary bulbs, Edison bulbs aren’t cheap, but they are so nifty. To aptly exhibit an Edison...