Theres still a lot of misinformation floating around, and while you’re on the right track Justin, lets get the terminology right, so everyone can get on the same page regarding LEDs.
First off, the best LED grow lights will alway use diodes. The reason is simple- diodes have become powerfull enough that they work well, and prices will only come down. COBS work very well, but since they are a point source, they cannot give you optimum coverage. Many diodes spaced intelligently, kept at the correct distance will beat COBS all day long. They run cooler, and are more efficient overall.
PAR is Photosynthetically Active Radiation. It is not a measurement of intensity. PAR only defines the spectrum. PPF- Photosynthetic Photon Flux is a measurement and tells us how many PAR photons a light emits per second. PPFD-Photosynthetic Photon Flux Density is a measurement of how many PAR photons are landing on a given area per second. Think of it like a birdshot shotgun shell. The balls are the shells PAR. The shell has only so many little lead balls in it (PPF). If you shoot those balls at an object close to the muzzle, they all hit close to each other, in a concentrated pattern (High PPFD). Fire at an object further away, and the balls will disperse and land over a larger area (Low PPFD).