PHatDriver Posted September 30, 2023 Share Posted September 30, 2023 Hi all, Is the 1 gram a watt equation for the older style lamps, like HPS. Is there a new equation for LEDs? Just wondering. Thanx... 1 Link to comment Share on other sites More sharing options...
stu914 Posted September 30, 2023 Share Posted September 30, 2023 Lot's of stories out there about yields with leds and it's up to you what to believe... Anything less than 1gpw is pretty poor though, I've heard of people returning over 2gpw but the best for me was 1.6... 2 Link to comment Share on other sites More sharing options...
Lux_Interior Posted September 30, 2023 Share Posted September 30, 2023 46 minutes ago, PHatDriver said: Hi all, Is the 1 gram a watt equation for the older style lamps, like HPS. Is there a new equation for LEDs? Just wondering. Thanx... That equation is a bit simplistic. It's like saying my 125cc bike is faster than yours. It all depends on what it is, what you have done to it and how you ride it. 1 Link to comment Share on other sites More sharing options...
catweazle1 Posted September 30, 2023 Share Posted September 30, 2023 (edited) A kilo out of a 1.2 tent shining 500w is 2g/w. 9 plants is a bit over 4ozs each Edited September 30, 2023 by catweazle1 Link to comment Share on other sites More sharing options...
Consul Posted September 30, 2023 Share Posted September 30, 2023 using the same light, same amount of watts, you could grow a clone for 12 weeks and get 50g or for 18 weeks and get 100g, producing different g/w results. it's a useless metric, anyone using it doesn't really know what they're talking about. kw/h tho that's a different story. 1 Link to comment Share on other sites More sharing options...
catweazle1 Posted September 30, 2023 Share Posted September 30, 2023 (edited) Just now, Consul said: using the same light, same amount of watts, you could grow a clone for 12 weeks and get 50g or for 18 weeks and get 100g, producing different g/w results. it's a useless metric, anyone using it doesn't really know what they're talking about. kw/h tho that's a different story. I was working with what to realistically expect off a plant grown to a metre having been double topped and lower third removed. Edited September 30, 2023 by catweazle1 Link to comment Share on other sites More sharing options...
MidgeSmith Posted September 30, 2023 Share Posted September 30, 2023 1 hour ago, PHatDriver said: Hi all, Is the 1 gram a watt equation for the older style lamps, like HPS. Is there a new equation for LEDs? Just wondering. Thanx... Also, my triple 'old style' quantum boards are not as well spread as the new bar based arrays, so I have to use 320W higher up rather than 240W lower down to cover the edges of my 1200 x 600 tent better. If I had bars I could achieve a better g/w due to the imprroved spread. 1 Link to comment Share on other sites More sharing options...
Consul Posted September 30, 2023 Share Posted September 30, 2023 Just now, catweazle1 said: I was working with what to realistically expect off a plant grown to a metre having been double topped and lower third removed. i know mate i wasnt sniping just meaning if someone starts bragging they can pull 4g/w it doesn't really tell us anything, they could have been vegging the plant for 12 months and its not a measure of how much electricity has been used to grow, so people shouldn't worry about it 1 Link to comment Share on other sites More sharing options...
GSZZ Posted September 30, 2023 Share Posted September 30, 2023 Just now, Consul said: kw/h tho that's a different story. seen a few people express in grams per PPF and/or grams per PPFD - the latter looks better 4 Link to comment Share on other sites More sharing options...
Banarchylamp Posted September 30, 2023 Share Posted September 30, 2023 (edited) Growing a clone for 12 or 18 weeks?? I'd be pissed off if I grew a clone out and got just shy of 2z after 3 month..let alone 4.5 month Maybe I'm doing it wrong Edited September 30, 2023 by Banarchylamp Pretty sure it's a mix up. Atb Anarchycamp 1 Link to comment Share on other sites More sharing options...
Consul Posted September 30, 2023 Share Posted September 30, 2023 Just now, GSZZ said: seen a few people express in grams per PPF and/or grams per PPFD - the latter looks better hahaha still useless as its missing time spent, maybe G/DLI but it could get complicated. need to call in Einstein to do some equations and show the energy efficiency of someones wet branches haha. Link to comment Share on other sites More sharing options...
catweazle1 Posted September 30, 2023 Share Posted September 30, 2023 (edited) Would g/foot area be a better measure? Tents are standard sizes generally. Too many variables in G/W. Do we include all energy use? The G/F equivalent of a kilo in a 4ft space is 62.5g/foot Edited September 30, 2023 by catweazle1 Link to comment Share on other sites More sharing options...
Darknight420710 Posted September 30, 2023 Share Posted September 30, 2023 22 minutes ago, GSZZ said: seen a few people express in grams per PPF and/or grams per PPFD - the latter looks better Thats how I measure things, ive got a 275w par and a Ppfd app on my phone, I can get the perfect coverage all corners at 190w and yields are around the 7oz over 3 plants 2 Link to comment Share on other sites More sharing options...
Arthur Mix Posted September 30, 2023 Share Posted September 30, 2023 I reckon it should be the total watts of not just the lights but everything used . 12 Link to comment Share on other sites More sharing options...
Military Grade Posted October 1, 2023 Share Posted October 1, 2023 I like the how much did it cost me to grow vs how much it would have cost me from a dealer equation 11 Link to comment Share on other sites More sharing options...
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