We have more than a few area's where we have high and low bay lighting, those fittings are also supplied by via trunking incorporating plug and socket arrangements. Our Installations are purely for ease of future maintenance and/or replacement/removal. We don't use fuse protected outlets (UK 13A style) but even if we did, the fuse is there to protect the connecting flexible cable, NOT the light fitting. ....And Yes, all was installed in metal containment systems...lol!!
This method of providing power to light fittings was standard practice at all the companies factories that i did my training with, both high level and under the lines, the latter using non standard pin 13A socket outlets.... In fact when i come to think about it, literally everything was on plug and socket of one type or another, limit switches, motors, traveling pick-up/collectors on overhead bus systems to name but a few!! lol!!