LED "Daylight" bulbs

Not feasible with that nightclub/bar.

There will always be some risk of groupthink/group hysteria.

Your mixing up (correlated) Colour Temperature with Spectral Power Distribution, helped by suspect marketing.

Why not? It's a workplace, so the 1992 regs apply for the benefit ot the workers there.

- Mike

Its actually a social club.

Because it appears to mostly operate at night and moonlight leaves rather a lot to be desired in a place like that.

It's a workplace, so the 1992 regs apply for the benefit ot

Yes, but natural light just isn't viable there.

You seem to have misunderstood me, the regs don't specify that it should be actual natural light, although that it preferable, just close to it and most importantly, not dangerous in any way (such as causing headaches).

- Mike

No.

the regs don't specify that it

The regs say nothing like that. What they actually say is that it should be natural light when that is possible.

It isn't with a social club mostly used at night.

and most importantly, not dangerous in any way (such as

There is no evidence that it does cause headaches, just that they are seeing some groupthink/group hysteria.