Quote:
Originally Posted by Racefan
Very few get that return. Most are considered decent growers if they get half that (1/2 watt per gram per 30 days). Only the perfect set ups with the perfect strains get the perfect big yields. I myself used to get hung up on all that benchmark hype and it darn near drove me crazy. i kept trying to improve here and there and bought tons of equipment and additives. then I realized that all a long I'd been growing more than I could use and didn't need to improve in that area so i concentrated on flavors and potency rather than yield and think it was the best move ever.
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1/2 watt per gram? Err... Did you mean 1/2 gram per watt? There's a big difference lol. If I got two grams per watt (1/2 watt per gram) consistently, I'd have been pretty happy indeed
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Assuming that you meant 1/2 gram per watt:
Since one month is only half of an eight-week flower cycle, in affect that IS one watt per gram, isn't it? I mean, (it seems to me) that you're talking about harvesting half the room and getting 1/2 gram per watt? Or are you growing some alien strain with a 30-day flowering cycle (in which case your yield would be valid - by itself - for this discusion).
Quote:
Originally Posted by Weed420
1 gram per 1 watt is doable for one fower cycle. 1 gram per 1 watt per 30 days would mean aproximately 6 ounces per plant.
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That really doesn't enter into it at all. What if the person is growing SoG with nine - or more - plants per square foot? They're not going to get anywhere near six ounces per plant - but they may well net a gram per watt amount. And then there's the people who grow ONE plant in a ScroG setup and allow it to fill their GR. Again, they might well harvest more than one gram per watt.
Which causes me to ask: Unless someone is only growing one crop per year or whatever, doesn't the amount of time it takes to produce a given amount of MJ have to enter into it?
How about "grams per watt per year?" That person with ultra-dense plantings will have more harvests (IF a single-room setup is used to both vegetate and flower - hey, there's another factor that must be taken into consideration!) per year than the person who vegetates one plant so as to be able to fill an 8 to 12 square foot screen (again, using only one room/cabinet for the entire plant's life).
One really must take into account one's setup, growing conditions, and other factors to make something like "grams per watt" a useful benchmark.
Some vehicles are very fuel-efficient (you could say they have a high "grams per watt" number lol) BUT they have like a nine-gallon fuel tank. My truck gets 19mpg - at best - on the highway. But I can fit a lot more fuel in it's tank. And then I can fill the
second tank.
Guess which vehicle I'd take if I had to drive across a large lonely desert?
To further ramble... Suppose I had to take 2000 pounds of equipment on that journey? My truck is going to drop a couple miles per gallon. That uber-efficient car might drop by half. And if I had to pull a trailer... That car just fell completely out of the race.
But that's ok - I can stop, dig out the chain, and tow the car the rest of the way across the desert to the next fuel stop lol. It won't make that much difference to the truck.
I'm just trying to state that fixating on something like "grams per watt" without looking at the big picture is absolutely useless.
Unless someone is going to just grow one crop... ever.
Maybe "grams per watt per year per dollar of (ALL) equipment plus dollar of electricity plus wear and tear on ALL related equipment (including lights, pumps, fans, filters, the air conditioning and/or heating, dehumidifiers, etc.)" would be a more realistic comparison?
Quote:
Originally Posted by outdo0rmaster
How this come ? (Watt - Lumen)
Very simple,Watt is not unit of light measurement.Watt is measurement unit for power conversion or simple for spended energy.
Now,bulb use electric energy to produce light.Measurement unit for light is Lumen.Hence plants need light (Lumens) with specific color (nm) for photosynthesis (food making) you can not say Watt cause that is totally wrong.
Calculating yield who directly depends of issued Lumens but say Watt are not correct.
HPS,can not beat sun
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You have some fine points. Different lights have different efficiency levels. In addition to that statement, I would guess that people don't use the
actual amount of watts consumed by the light but rather the rating of its bulb. And again, there are all the other things involved that consume "watts" such as whatever it takes to remove the additional heat produced by a large light - or a bunch of relatively inneficient ones (such as florescents - sure a 23-watt CFL doesn't put out much heat, but stick enough into a box to equal the illumination cast by your 600-watt HPS and you could bake a turkey on top - something people seem to forget).
Although I don't know about the "
HPS,can not beat sun" part; they make HPS lights up to, what, 4000 watts? Stick one of them into the average GR setup and it would produce so much illumination that it'd literally bleach the plants (actually, a 1500-watt one would probably do that).