jetajockey
come get me tang police!
Hey Jeta I cant figure out this whole par thing. I dont see it on the box when I buy a bulb and it throws me off anyway.
Light bulbs/fixtures are not going to list their PAR data on the box. The data on that chart is what was gathered through actual testing. The chart just shows the different PAR levels for each fixture type to get an idea of how much light they actually are putting out. The bulb type is assumed to be a bulb that is conducive to plant growth, so for the sake of testing it can be assumed that all used basically the same kelvin bulb since the differences between plant-friendly bulbs is negligible.
That thread, and the one before it (par vs distance) are great reads and really explain everything well.