Hey Green, I was comparing par graphs - the one you made, A51's, and the Growershouse bulb and ballast comparisons and I noticed something that puzzles me about the Growershouse charts. (I'll see if I can figure out how to add them into my post below) On the bulb test they where getting 1800-1900+ on center and around 1000 at the 2x2, but on the ballast test they where only getting half of those readings using the bulb that did the best on the bulb test. Both charts where done at a 24" height and the only thing different is the reflector they used. I don't see how changing reflectors can cut your par readings in half, and I was hoping you know why there is such a big discrepancy.
The reason I ask is because I don't know which chart to use to compare the led charts to the 1000w light output as one shows double the umoles as the other. Also, I can't seem to find a par chart for a 600w hps anywhere and it would be nice to have that info available for comparison as well, so if you know where one is please do share.
I'm currently running 1k's and I can definitely see a change in bud size and structure at about 2' or so out from the center point of the bulb. When I make the switch to led's I want to make sure they will deliver that same intensity as that inner area (and hopefully spread it out even better) especially since I'm going to be adding co2 as well (just got set up to try it out on my next rotation).
Thanks for sharing your tests, charts, and grows with everyone here, this thread has been a wealth of information!!
I hope now that you got another thread going that you don't let this one die. Thanks GG!