I would also call attention to the cord connected fixtures where the receptacle is not located properly according to Section 410-30(c) Electric-Discharge Fixtures.
1. A listed fixture or a listed assembly shall be permitted to be cord connected if
a. The fixture is located directly below the outlet box or busway, and
b. The flexible cord is
1. Visible for its entire length outside the fixture,
2. Not subject to strain or physical damage, and
3. Terminated in a grounding-type attachment plug cap, busway plug or have a fixture assembly with a strain relief and canopy.