I started off by making the back wall attaching piece which i made a circle sketch of and extruded by 1 inch. I also used the fillet tool to make it look similar to the reference. The main part which connected the back plate and the glass light was made through a sketch midway through the back plate with it having rounded top and straight bottom. For the light itself i used the revolve feature coming from a sketch on that same midway plane. I made the sphere end just a bit over the back plate. I added the top solid cover also using revolve the same as with the main body. On the to i connected it with the connecting rod with a narrow cylinder coming up to it. I also added fixation details which are only for looks nd do nothing.