Surface lights burned out

Opened the cover. Removed burned out bulbs. Ordered replacements which arrived fairly quickly. Forgot to turn off power to unit (didn't matter in the end!). Using the bubble wrap the new bulbs came in, I inserted the bulbs one by one into their respective sockets. Not really tricky but the surface light is in the back of the microwave so I had to lean over the stove to get all the way back. Once in the bulbs worked fine. Closed the cover. All back to normal.