![](https://article-imgs.scribdassets.com/2outuaajr4cnvjpw/images/fileYDFPNHDM.jpg)
Every light in our home takes a different type of bulb. The house is over a hundred years old, so I should be grateful I don’t have to go around every night with a lamplighter. But it’s frustrating.
I have a giant drawer with a selection of Edison’s descendants, and there must