Re: WHY ARE THERE DOWNLIGHTERS UNDER THE WINDOW SILLS
At least three of those suggestions are the things done by people who don't consider safety a prime factor. They use multi-gang extension leads, often daisy chained. Way cheaper and they care more about costs and profits than anything else.
The growers I've known (not many of course, honest, and only anecdotal tales long after they've paid their debt to society, honest!) were very considerate when it came to safety. Anything but the best could damage their product and thus their income, and of course one of the quickest ways to let cops etc know the location a growing op was to set fire to it.
Grow well, sell well, play well....
(Besides, they had to spend their money on something. With all sorts of laws in place to detect people using lots of cash for things, might as well spend it on decent electrical fittings, it's not like they were short... Mines the one with "propagating for beginners" in the pocket)