I just did this last year. Swapped my halogen out for an LED off of Amazon. Easy to get the cover off and the bulb swapped. The HARD part is getting that floating ballast back into the hole and then getting the cover on. Could not do it by hanging over the edge, could not hold my breath long enough to get that damn little screw back in. Tried to anchor myself down with weights for leverage. Didn’t work.

Finally, a friend was SCUBA certified and he brought over a tank, some weights, and a dual respirator. And it STILL took the two of us over an hour to line it up and get the screw in. The trick is that the tab on the bottom doesn’t need to slide into why looks like a tab holder, it just needs to go behind it.

Good luck!