PurpleGunRack
Well-Known Member
Agreed it's an important factor..but it's not the only factor...I've seen some great results from low wattage light's and some dire results from supposed high par/high wattage set ups
Light is the most important factor for plants, they only exist because of photosynthesis. No light, no plants, simple as that.
You'll always be able to grow crap in light, but you'll never grow anything in the dark
Just because a good grower can grow nice nugs under CFL, doesn't mean it isn't shit light for plants, and that grower would do way better under proper lighting.
A beginner can grow crappy twigs under the meanest DIY COB build you can find, doesn't mean the light isn't good for plants, and that grower would do worse under inferior light.
The only way to get a proper scale to grade lights is to measure PPFD, and light efficiency is measured by looking at how many Watts it takes to get to the desired PPFD level.
Btw PAR isn't a unit for measuring it just means the lightwaves between 400nm and 700nm, and Watt measures how much energy is put in