Grams per watt

Mozzer496

Active Member
Hey. I'm a bit confused on what to believe. So a hps set up can pull 0.5 g per watt and a good led can pull 1 - 1.5 or even 2g per watt. Is this true has anyone had results that prove this?. If I use a 600 hps I'll get 300g but if I used a 300 true watt led I cound get 600g or even more ?. Seems abit to good to be true.
 
Hey. I'm a bit confused on what to believe. So a hps set up can pull 0.5 g per watt and a good led can pull 1 - 1.5 or even 2g per watt. Is this true has anyone had results that prove this?. If I use a 600 hps I'll get 300g but if I used a 300 true watt led I cound get 600g or even more ?. Seems abit to good to be true.

I just got 1.19gpw off last run 5D8B2CAC-0C64-4E61-89C9-4DAD4895466B.jpegF6589B11-F1F8-4C60-9ED4-B5FFDDB92559.jpeg
 

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Hey. I'm a bit confused on what to believe. So a hps set up can pull 0.5 g per watt and a good led can pull 1 - 1.5 or even 2g per watt. Is this true has anyone had results that prove this?. If I use a 600 hps I'll get 300g but if I used a 300 true watt led I cound get 600g or even more ?. Seems abit to good to be true.
I have pulled in excess of 1 gram per watt with HPS, 1 gram per watt is a pretty good bar to measure success with.
 
It really depends more on how you light your area, hanging height/spread, wattage per square foot, genetics and environment. Led kinda makes g/w inconsequential as you can grow in so many different ways than just dropping a 600 in a 4x4. G/square foot is a more relevant measure, how are you doing on that? Imagine you could do the same or a little bit more with less watts and you got a more accurate picture. But remember that with leds keeping a perfect environment and understanding vpd is more important than ever. If youre unsure of how to be able to control these factors (especially allways keeping your bloom temp +81F) you can also think of CMH which is good allaround light.
 
I wouldn't worry about what type of light you are using in relation to gpw. In my opinion the biggest factors to achieve good gpw in decending order are
1) Strain
2) Health
3) Light
4) Growing style (think training and veg time, not hydro vs soil etc)
As soon as one figures out a way to effectively light ones space with 25-30w per square foot it just gets so much easier cause you only need to do around 2 ounces per square foot which is well within the possible. All of the factors you name are important in any grow for yield, but having a low wattage per square foot which makes 2/w possible is the biggest factor imho.
 
Well I'm assuming that people are using a 50 watts per square foot standard to light their space regardless of their lights. What people choose is their choice, but 50 used to be the standard.
 
Well I'm assuming that people are using a 50 watts per square foot standard to light their space regardless of their lights. What people choose is their choice, but 50 used to be the standard.
I use 45w/sqft and sometimes I have to dim it down for more sensitive Indicas. Watts is an inaccurate comparison due to efficiency ratings. You can have 2 lights using the same wattage and one give off way more usable light. I was as skeptic of LED for a long time. These Cool logic pucks made a believer out of me. I pull way more yield than my DE HPS and the quality and denseness is so much better. I don't know if it's the lack of so much radiant heat or the spread on the LED substrate. The difference was substantial.
 
Well, the history of it was that people weren't not using LEDs back in the day and not many people had lux meters so it was simplified to 50 watts per square foot. You can complicate it to your hearts desire and take 5 watts off here or add 5 watts there. Is still stand by it and think you want to be right around there but I know many people who are under and over as well. Ask a thousand growers and I think we are in the ballpark
 
Well, the history of it was that people weren't not using LEDs back in the day and not many people had lux meters so it was simplified to 50 watts per square foot. You can complicate it to your hearts desire and take 5 watts off here or add 5 watts there. Is still stand by it and think you want to be right around there but I know many people who are under and over as well. Ask a thousand growers and I think we are in the ballpark
Youre completely right if you go by 50w per square foot, the whole idea is that you can do the equivalent lighting with 25-30w.
 
4) Growing style (think training and veg time
If this is the case how are the 2 light sources any different in actual yield? Look at the bud factory yield, dude veg for 3 months and forgot to mention that being a major factor in their yield. Now look at renfro's garden, huge veg with huge yields and its a different light then the bud factory light. The same equipment are being used other than lights. I see splits all over the place now a days.
 
Right right already my aunt has a mustache come on baba come on turn back and just read what you wrote before click to post

Ah the little piggies , how they snort n they grunt ....
I will admit, that I’ve yet to brake 2gpw , but I’m dealing with limited head room.
I have broke 1.9 so 2 is possible

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Understanding cause & affect goes a long ways .
 
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