If you guys notice I don't respond to many of the NG' s that attempt to instigate a reaction outta me, it's because I have them on ignore.
They twist words & turn your quotes into their own meanings to cause problems & spread more misinformation.
Since I e done this, my time here is much more pleasant.
I like how a calculator is their determining factor as to how an led configuration is an HPS killer. LMFOA! Perfect example of what I'm talking about.
Who made these wrong spread-sheets anyways? Last one I saw showed a 1200 DE barely covering a 5'x5'. They are giving false info about HPS. Grow a side by side then apply your findings to a spread-sheet. Don't just calculate it. Geeze! Sounds like some of the companies her who don't even use a light meter to determine PPFD. Just math equations. Then they sell you those equations so you can plan your lay-out.
If one was to use an actual light meter, I bet it would be a whole different story. Never #'s at different heights either. Wtf. I don't trust any of it.