Painted light bracket parts with cold gal, and assembled when touch dry.
Installed nutplates on bracket and two places on the compartment flange to secure the rib/door. On the most forward I can't see or feel the back of the rivet to inspect, and sure enuf, when I fit the light and door this one pops off. Could not be bothered fixing today, will look at it next time.
Check the likely range of movement, and all is good. Pointed the light In what I hope is a reasonable direction and did the final trim for the light window frame.