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so then PAR is a factor multiplied by watts? So since CFL and mh have the same PAR factor from the chart, then if it was possible to pump equal watts into both, then they would be equivalent for growing purposes? Lumens has nothing to do with the equation then?

and according to that sylvania chart, a HID bulb has equivalent PAR to a consumer 6500k flouro. So lumen for lumen they are the same, but the flouro uses more watts? mogie, since you are so resourceful, where does "penetration" come from? Lumens, watts, what? Or what exactly is...

that's whats up - thanks man

according to many on this forum, one very smart one in particular, HID lights do not put out solely PAR lumens - meaning that while they may be bright, whatever percent is out of the PAR range is not used by the plant. I guess my real question is what % of CFL is out of PAR and what % of MH...

I was intrigued by babygro's explanation of PAR wattage in the CFL vs HID title fight thread - as well as someone's (perhaps babygro again) insinuation that flouro light is "higher quality" than HID. So I am finishing seedling stage and about to purchase lights for the veg phase; I have...

dude that was so fast; so I guess thats why the plant closest to the lights had its tips turn yellow yesterday (they are ok now though)

from someone who is sure: are water droplets on seedling leaves beneficial other than for the passive purpose of strengthening stems? I can't decide if the droplets act as a magnifier for light, or a reflector. If they do serve as a magnifier, is the light they magnify just the human visible...