Low Pressure Sodium (LPS)

All my brief research in the matter in inconclusive.

There are many light nerds on the site here and maybe someone can put this to rest definitively.

I am bringing this up because I have an acquaintance with limited xp growing and he is set on LPS because he has access to a bunch and it has a high lumen output that is able to penetrate fog well. I told him I didnt think they are a good choice just as Halogen or Mercury Vapour are not either. I could explain Halogen and MV but I am at a loss as for why LPS is not good other than it does not seem to be popular. I like to be able to back up "advice" with facts, and I just dont have any for LPS.

Is there a man or woman out there well versed in the does and dont's of LPS?

In the old days there were tales of people stealing street lights to grow with,they were LPS. Do the bulbs list the K value?

Because the spectral output is really, really shit.
It's just yellow light.

No blue, no green, no red, no far-red just yellow

So that's the spectrum on a Low Pressure Sodium bulb (found on wiki), I'm guessing that's why people don't grow with them

"Low pressure sodium lamps, the most efficient gas-discharge lamp type,

producing up to 200 lumens per watt, but at the expense of very poor color rendering.

The almost monochromatic yellow light is only acceptable for street lighting and similar applications."

https://en.wikipedia.org/wiki/Gas-discharge_lamp

https://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/High_Pressure_Sodium_Lamp_Spectrum.jpg/800px-High_Pressure_Sodium_Lamp_Spectrum.jpg (pic)

Cool thanks guys.