Can anyone tell me the trick to install the three little clips that hold the bulb in the work light rim, the bulb keeps slipping around.

It's one of those tasks where three hands would be nice. I used needle nose pliers to get mine on. Install the section that folds over the edge of the bulb, and the straight wire under the ledge around the edge of the housing, then hold the bulb and grab the wire section that bends at 90° with the pliers and bend it out to get it under the lip.

Couple other thoughts on this: I folded a towel several times to work on. You can press down on the housing and the towel absorbs the rounded shape of the light so it doesn't roll around on your bench while you try to do this. Also, the first clip is easy - install the 2nd one on the opposite side of the housing and then split the difference between the two with the 3rd clip. Stay away from bottom of the housing to avoid interfering with the screw that attaches the rim (door) to the housing.

Thanks for the information