Black... nail... polish...
Solves every LED problem.
Xerox, why did you think the power led on your multifunction should light up not only my home office, but the room next to it too?
Thank you for this tip!
I have some Black 3.0 (blackest paint on earth) I'm gonna try this with!!!
Black electrical tape is even better. Because then it can be trivially peeled off later instead of requiring polish remover and a brush.