"The lights are on but nobody's home" used to be a slur, a criticism of inability, inadequacy, ineptitude. Not any more.
Today, it's one of the highest accolades that can be paid to a company or organization.
Just imagine: You've had a hard day in the office and it's a miserable winter's evening. There's no one at home and you're going back to a house that's cold and dark, you'll have to cook dinner when you get in and you missed the TV show that you wanted to see.