30 years ago I did 12 hour shifts at a factory, and it really wasn't too bad. It was 4 on 3 off one week, and 3 on 4 off the other week. The OT on week one made up for the lost hours on week two, and having 3 or 4 days off was pretty sweet. But it was a QC job, for a European company in the US, sitting all night inspecting small parts, and was pretty chill.
My brother in law worked at the BMW factory in SC, and they did 4 10 hour shifts, with the days off rotating each week. They only ran 6 days a week, so you'd end up with 5 days off every 4 weeks whenever the days off from two weeks lined up. He liked the 5 days off when they happened, but the rotating days off didn't line up with my sisters schedule, so that was tough.
My mom buys these cheap LED bulbs from Amazon and about half burn out quickly (probably 10% are DOA).
We have 100% LEDs throughout our fifth wheel (about 30 of them), and they are all still going strong (all installed in 2015, and used daily since then).
I think there's a serious difference in quality available and it certainly shows.