i'm curious about LED lighting
i'm familiar with Fluorescent lights
i'm familiar with the basic technology, i'm familiar with the lighting number (eg. 6500K) i'm familiar with how this number can be used to sell lights with completely BS expectations, ... also familiar with the expectation any reputable producer will provide with a 6500K spectrum (for growing plants)
i'm familiar with how Fluorescent lights are also typically rated with a lumen rating (it's apparent brightness as it relates to the sensitivity of the human eye (also why these lights like to have a significant green spike to appear brighter, and as such provide a higher lumen rating (that may take away from what the plants want) ... anyway, not the point of this thread
now when it comes to LEDs
they rate by PAR
i'm familiar with a color spectrum that looks like an M (in vague terms) that plants want for PUR
i see PAR as a single number (similar to the Kelvin rating for fluorescent lights)
and the skeptical part of my mind says a single number to reference a wide range of spectrum features is ripe for marketing & sales abuse
today, looking up lighting again (there's actually a lot to learn once you start)
and LEDs list a PAR rating of 30 or 48, ... and kelvin ratings of 3000, & 4000 (i guess for us old school folks)
now to me that 3-4000 kelvin rating is more red, less blue (or any combination there of) then what would keep plants totally happy so what is a good PAR for plants that delivers a nice light spectrum for plants ?
why is any particular PAR rating good over another PAR number ?
i'll continue looking into this, but as last i looked about a year ago, i gave up after lots of disappointment at a lack of information.
so now i'm asking here hoping to find some answers i could not find before