Ann: First Cannabis Crop Harvested at Duncan Facility, page-156

Sorry late reply mate went hit golf balls with a mate after dinner just got a chance....see below

They have utilised the Dutch sea of green system which works on 15-20 plants “Per Square Metre” and from the photo’s its looks like they have employed the later with 5 large rock wool cubes per row which ultimately is best practice to shorten vegetative period, increase quality/uniformity of produce/yield and slightly reducing vegetative timeline/requirements.

I have assumed that the width of the bench is 1 metre and I believe there are 12 benches from the photos, plus there will be walk ways between every second bench which will be very narrow to allow the canopies to touch a few weeks into flowering to obtain full canopy or sea of greenJas desired.

You haven’t said it @PH6dotHydro but good spotting I think as I just had another look and enlarged the screen to check globe size, as energy does matter, and noticed there’s 4 lights per row equating to 96 lights in total which now makes me think their using 400’s or seriously have some over kill going on here. 400’s are definitely most suited to this system as the canopy depth is not significant enough to substantiate needing 600’s, but originally I only quickly looked out of curiosity.

In respects to area I have assumed that the benches are 1 metre wide * 12 plus 3* 400mm, walk ways for plant out between every second row till the rear wall, plus 1 * 200mm spacing to match canopy extension past table 1, closest to our view, to match other spacing’s in the walkways, if that makes sense to you, giving me an estimate of a grow area length of 13.4 metres for the overall canopy length.

For width, based on my previous assumptions combined with the visual of 20 plants per square metre, I then simply equated that the tables were 4 metres wide including some canopy overhang on one side for, both rows, once in full bloom.

Which is 13.4 * 4.02986 for each row being 54 square metres *2 rows = 108 SQM of canopy, thereabouts.


Then 60kg converted to grams which is 60, 000 grams or 555.55 grams per square metre where I am stating optimal/industry standard over the area would be 75600 or 700 grams per square metre, but still good enough, and if you want to get into the nitty gritty we then really need to look at energy used per square metre so 96 * 400 watts = 38400 watts divided by area @ 108 SQM equalling 355.5556 watts per SQM which is great and I would design lighting systems @around 357.142 watts per SQM to achieve the desired.

Maybe the real question is did all of those grams make it to the scales…lol these guys are on to it no dramas hereJ