Basically, there is no correct answer. I could put a Chinese black box of green leds above your tank and increase your perceived PAR to 2000(the meter is dumb and will read 532nm green as PAR), but this would do zero for plants or corals and look ugly as hell.
PUR is phontsynthetically useable radiation, there’s no PUR meter, because it’s different for everything.
My point is you can not use a PAR meter to dictate your lighting choices. “My corals aren’t doing good, PAR meter says I need moar PAR.” Not a good way of doing things.
Water quality/stability in my opinion is a much more worthwhile obsession. Take a look at guys tanks online that are obsessed about lighting, that should tell you a bit about how important reef lighting is.