Falcon35, if you have the one in early photo in ceiling, you may have to pull fixture down about 1.5 inches and putting your thumb and forefinger around the fixture above the silver ring hold tight and twist counter clockwise on the glass and it will unscrew, then just unplug the hot light and put the new led in, caution depends but I found by trial and error that I needed warm white, the bright white hurts the eyes.
Logic will carry you from point A to point B. Imagination will carry you everywhere. "Albert Einstein". 2011 Georgetown 360, Bride of 45yrs, and 2014 Chev Equinox toad, what more could you ask for.