from what I gathered the general numbers are those
-seedling 60/100 umoles
-veg 300/500 umoles
-flower 800/1000
-flower+CO2 around 800/100ppm up to 1500 umoles
more that is not useful to the plant, since the light provided energy can be used and stored up to a certain point.
even after u set ambient temperatures of 30c+ where the cinetic energy of ambient pump plant phytoreactions to the top levels archivable its wasted money in my point of view to supplement more than those levels of energy.
I get my umoles (more or less) from the spec sheet of my 308 lm301b pcb
having a scheme of what umoles I get on a certain amperage
i have the rough estimate
worse thing was that almost every spec sheets has a total umoles emitted value tested in a sphere so not exatly the same output would get to the canopy....
had to dive deep in to inverse square law to have a realistic estimate of my canopy esposition!!
sadly couldn't afford a real par reader...what brand did u get?