Changing light bulbs

I had an adventure changing the light bulbs in my ceiling light inside my walk-in closet. First I had to figure out how to unscrew the glass cover with a metal point in the center. Standing on a step stool and 2 phone books to reach it, I unscrewed and unscrewed the glass cover. Nothing came down. I next twisted the metal piece in the center, but that did not move at all. I moved my step stool to another light closer to my head in the hallway. I figured out after several minutes the metal piece unscrews and makes the glass drop down. I grabbed a plastic shelf cover I use to unscrew cranberry juice bottles and unscrewed the metal piece in the closet. Behold, an empty light bulb socket with a 100 watt bulb in the other socket. The socket said 60 watt bulbs are to be used this socket. Excuse me, isn't using the wrong size of light bulb a set up to starting an electrical fire? Maybe not. I placed correct size 60 watt bulbs in the socket and screwed the glass cover and metal piece back on. Then I had to put back the other cover in the hallway. I have a much brighter light in my closet now. Post later. Bye!