The shop lights hang at 8' with about 7' of space
over them to the roof.
There's about a 1/2" opening the whole length on
both sides between the ballast and wiring and the
lamp reflector for ventilation.
When it's cool tomorrow I'll re-check the grounding.
The outlets that they plug into show normal conditions
when I plug in one of the LED testers that shows
reversed, missing ground, etc.
Probably time to present the concept of new lights
to the 'finance committee' and see what she says.

The lights on the inside of the house are what I
would describe as kitchen lights - four 2' tubes
in a square box mounted on the ceiling (not recessed)
covered by a translucent panel.
J