I could be mistaken with this nitpick but isn't there a unit mismatch in "...just 20 watts—the same amount of electricity that powers two LED lightbulbs for 24 hours..."?
Just 20 watts, the same amount of electricity that powers 2 LED lightbulbs for 24 hours, one nanosecond, or twelve-thousand years.
There is indeed; Watts aren't energy, and it's a common enough mistake that Technology Connections made a pretty good 52 minute video about it the other month [1].