Brother HL-2170W - Kill A Watt readings?

[tenders]

All laser printers surge for a second or two when they're waking up to print a job. Heck, vacuum cleaners do the same thing when you turn the switch on.

I have a 7820N myself, and use the momentary dimming of the lights as a handy indicator that the print job I just sent from another room is going through.