Good lamp!^^^Ya they say that but the numbers don't quite match up. They have some videos in the media section that show some field measurements.
Since I have seen it shown as 1000-1100umols@12" and the avg700umols@18" and those numbers don't quite match up. I did the math based on each one being true.
Situation #1 assumes that 1090umol@12" is the truest measurement...1r=12"
1090=S/4(pie)r^2
S=1090 (12.566371)
S=13697.344
Now move to 18"... r=1.5
I=13967.344/4(pie)(1.5)^2
I=13,697.344/28.274334
"I" should = 484.444umol...not 700
Situation #2 assumes that 700umol@18" is the truest measurement...1r=18"
700=S/4(pie)r^2
S=8,796.46
Now move back to 12" or (2/3)r
I=8,796.46/4(pie)(2/3)^2
I=8.796.46/5.5851
"I" should = 1574.99umol...not 1090
I have seen 1090 on my own single unit so I personally think that to be the truest situation. But if the average is from a line/array of AT's then the crossover can inflate the reading.
Either way 12" seems to be the new standard measuring point. Until the units get big enough that we need to measure from farther to capture the maximum. Very few companies are actually putting out 1000umol+@12" and any one that does is worth a chance IMO. Specially in the <200w category.
Here is another unknown lamp outputs more than 1100umol at 12" <150W.