Just been installing a number of batten fluorescents overhead in the garage. These came from Toolstation and use screwed terminal blocks to connect into. Unfortunately the damn screws are not captive and fall out onto the garage floor to disappear forever whenever it is least convenient. Getting stranded conduit wire into these was a no no, so I used crimped on terminations to give me an easier entry.
I don't understand why the manufacturer has not adjusted the plastic to make the screw captive. I have very old terminal blocks with captive screws so it is perfectly feasible.
Fortunately the screws are M3.5 so either a cut down electrical fixing screw or one of my spare terminal block screws got me out of trouble, but if I were a professional I'd look for another product where the screws were captive.