Is it dangerous to expose the human eye to 3,000 - 10,000+ lux of UV (ultra violet) light in the 380 - 400 nm wavelength?
I understand anything below 400 nm is tech classified as UV/UVA radiation but it is very close to the violet spectrum (which begins at 400nm). Further, most people can see light at 380+ nm ("the visible range or light spans 380 to 780 nm") which means that if it was damaging to the eye it would likely activate my eye's natural reflex?
Further, my belief that this would not pose a danger is partially based on this Wikipedia article which states that "UV radiation constitutes about 10% of the total light output of the Sun, and is thus present in sunlight" It also states that "at ground level sunlight is 44% visible light, 3% ultraviolet" and that "more than 95% is the longer wavelengths of UVA". On a bright sunny day more than 100,000 lux of light reaches the earth from the sun". A quick calculation shows that there's at least 3,000 lux of UV light at ground level which includes UV light from 315 to 400 nm.
Hence, my logic is that if we're talking about UV light with an upper wavelength of 380 - 400 nm, 3,000 lux should certainly be acceptable but probably more is also fine. But what is the upper limit?
Basically, I'm looking for an authoritative answer to this question (hopefully with sources and explanation): what is the max amount of UV light I could safely expose my eyes to in the 380 - 400 nm wavelength? And for how long?
Clarification: Based on @The Photon's response I think the correct word I'm looking for is "irradiance" not lux.
My question is: how much light in the violet spectrum (380 nm - 400 nm) is it safe to expose the eye to. In this case I would define light in terms of the amount of watt used to produce the light (for a lack of a better term).
For example, if I sit within 3 feet of 30 50W Ultra Violet UV LED would it be dangerous? Why / why not?