2.7 grams per watt Leds, truth or hype?

[HydroKid239]

I’ve gotten over 1gpw but have yet to hit those marks. I wouldn’t doubt it can be done with the right setup/genetics & feed dialed in.

 

[Autofire]

The 301's @ 22% better efficacy means it will cost me about $11 more per month in energy costs with the 281's. I know a lot more factors go into it, but looking just at the upfront cost difference between the two boards, it will take me quite a while before I'll be spending more for the electric for the 281's than the price difference of going with the 301's.

This is just the beginning of me dabbling in the LED world and if my history with hid holds true, these will be far from my last light purchase.
If led works for me I'm sure I'll upgrade soon enough.

better diodes = better PPFD = higher gpw potential.

You ask about the gpw of LEDs and then go buy a lower producing light for the sake of a couple of hundred bucks.

 

[Autofire]

I got 1.7 with a 260 watt HLG on my third second grow (larf inclusive). A good strain makes all the difference but so does good diodes.

 

[sunni]

quit arguing folks.

 

[Scuzzman]

I brought new led boards and target quality not quantity these days,so not to concerned about the GPW- I perfer GPF(grams per foot) under leds, I dont sell the stuff I grow - its for myself and a few older mates .. so really does not matter- think alot of new growers should think of using
GPF

 

[Johnny Lawrence]

The 301's @ 22% better efficacy means it will cost me about $11 more per month in energy costs with the 281's. I know a lot more factors go into it, but looking just at the upfront cost difference between the two boards, it will take me quite a while before I'll be spending more for the electric for the 281's than the price difference of going with the 301's.

This is a great place for a face palm meme.

 

[Johnny Lawrence]

^^^^
This is a great example why I stayed away from the Led scene.
Wtf is it with you guys about light specs?
Is it your version of muscle cars?

Anyone likes the lights?
Great

Don't like them?
Fine also.

It will just taste a little sweeter then when I harvest in 1 plant with my shitty lights what others get from their whole tent with their "top shelf" equipment.

At least that will still be the same as when I ran my "barn lights" too...

What?

 

[lusidghost]

I brought new led boards and target quality not quantity these days,so not to concerned about the GPW- I perfer GPF(grams per foot) under leds, I dont sell the stuff I grow - its for myself and a few older mates .. so really does not matter- think alot of new growers should think the GPF

I assume quantity and quality are tied together as far as the same genetics under an LED go, but I feel you. I've never actually weighed a yield altogether. I usually chop down a few plants at a time because my drying space is pretty small. I know when the yield is low, average or large. I just hope it's big enough, and that my vegging plants are timed out to be able to throw them into flower as soon as the last cycle's tent is cleared out, so that I never see a drought.

 

[.Smoke]

better diodes = better PPFD = higher gpw potential.

You ask about the gpw of LEDs and then go buy a lower producing light for the sake of a couple of hundred bucks.

I asked what people they were harvesting with their lights.

I'll make this easy. Here is my previous job title...

U.S. Air Force - Career Detail - Special Warfare Forces / Personnel Recovery Integrated Electronic Warfare Systems

Welcome to the United States Air Force. Learn about great opportunities for enlisted airmen, officers and health care professionals.

www.airforce.com

.

Now, anyone want to explain to me again how I don't understand electronics?

I'm here to grow weed folks.

 

[FastFreddi]

I asked what people they were harvesting with their lights.

I'll make this easy. Here is my previous job title...

U.S. Air Force - Career Detail - Special Warfare Forces / Personnel Recovery Integrated Electronic Warfare Systems

Welcome to the United States Air Force. Learn about great opportunities for enlisted airmen, officers and health care professionals.

www.airforce.com

.

Now, anyone want to explain to me again how I don't understand electronics?

I'm here to grow weed folks.

Ignore the bullshit Bro...I have seen your grows...you're gardening skills will beat out any efficacy loss you may have with those lights.
I'm sure a lot will be surprised when you show the first results.
This forum is full of the" I know best " garbage.
Keep on keeping on @ .Smoke.
FF

 

[Brettman]

quit arguing folks.

But then what would we do on here?

 

[rkymtnman]

hmmm.... an electronics specialist or this jabroni?? LMAO. do your thing @.Smoke

 

[jonnynobody]

I disagree, but I like my weed ripe. To each their own.

Only about 10%, maybe even less have ever been to my liking at the 8 week mark

Now if we are talking 8 weeks from actual buds forming then yes I’ll agree.

I don't think I've ever harvested anything under 63 days from the 12/12 flip. The fastest flowering strain I've grown was california hash plant (shit strain) and she took 9 weeks. You're on point. I've never chopped a plant at 56 days. Never.

Lol it's not that. It's just people normally "invest" in LEDs for their efficacy, so going with a less efficient fixture pushes your ROI out if you didn't save much on the light.

That being said I think almost any LED is easier to grow under, it's definitely easier to work under the fixtures while they are on. Easier to cool because it's not beaming that heat into the plants, easier to make the coverage you like etc. There are a lot more reasons to switch than I originally counted on when I first bought LEDs it was just for their efficacy.

I don't get too attached to any one technology... I have CMH HPS and LEDs and use all of them.

It's funny some consider their choice in light some kind of reflection of who they are as human being lmao. I

LED lights are the new muscle car. "What's under the hood man?" Emotions run just as high

 

[jonnynobody]

hmmm.... an electronics specialist or this jabroni?? LMAO. do your thing @.Smoke

View attachment 4868904

Man that picture brought me back. I didn't frequent a lot of those gigs, but when I did I went with the intention of killing a serious amount of brain cells A few good rolls and a couple hits of blotter set the mood just right. I will say ecstacy is a horrible drug though. Me and my buddies abused the shit out of it for about a year. Took us all about 6 months to get back to normal. Disrupted sleep patterns. Horrible depression. What goes up must come down right? Now Acid...oh now I have nothing but good memories of my tripping days. Much more fun omitting the ecstacy. As long as the acid was clean anyways

 

[MidnightSun72]

I don't think I've ever harvested anything under 63 days from the 12/12 flip. The fastest flowering strain I've grown was california hash plant (shit strain) and she took 9 weeks. You're on point. I've never chopped a plant at 56 days. Never.

LED lights are the new muscle car. "What's under the hood man?" Emotions run just as high

ya I mean most take about 9 weeks truely to get that sweet ripeness. But it's not thaaaat rare for a true 8 week finish.

for example. This is sandstorm by cannabiogen Flowered from clones. It'a a cross of Pakistani chitral Kush and morrocan hash plant.
These trichs are day 55. And to me these plants were ready.







so ya I mean most finish later. Some finish early. And also I like to harvest before there is too much amber just my preference. But I totally understand others who like to leave them late, I also like this on some strains.

 

[.Smoke]

ya I mean most take about 9 weeks truely to get that sweet ripeness. But it's not thaaaat rare for a true 8 week finish.

for example. This is sandstorm by cannabiogen Flowered from clones. It'a a cross of Pakistani chitral Kush and morrocan hash plant.
These trichs are day 55. And to me these plants were ready.


View attachment 4868942
View attachment 4868943

View attachment 4868944

so ya I mean most finish later. Some finish early. And also I like to harvest before there is too much amber just my preference. But I totally understand others who like to leave them late, I also like this on some strains.

Nice looking bud

 

[PJ Diaz]

The 301's @ 22% better efficacy means it will cost me about $11 more per month in energy costs with the 281's. I know a lot more factors go into it, but looking just at the upfront cost difference between the two boards, it will take me quite a while before I'll be spending more for the electric for the 281's than the price difference of going with the 301's.

This is just the beginning of me dabbling in the LED world and if my history with hid holds true, these will be far from my last light purchase.
If led works for me I'm sure I'll upgrade soon enough.

LM301b's are 25% brighter (220lm/w vs 165lm/w), but who's counting? Your power costs are only ten cents per kilowatt hour?

 

[PJ Diaz]

LM301b's are 25% brighter (220lm/w vs 165lm/w), but who's counting? Your power costs are only ten cents per kilowatt hour?

Since your diodes are 25% less efficient than the industry standard, once you are able to determine what the gram/watt is for the standard 301b diodes, you can go ahead and multiply that number by 0.75 to get the number for your boards. I hope that helps.

 

[.Smoke]

LM301b's are 25% brighter (220lm/w vs 165lm/w), but who's counting? Your power costs are only ten cents per kilowatt hour?

Ahh k. Thought I read they were 180lm.

Yeah, luckily I live in the crappy midwest, so electric is cheap. 11.4 cents/kWh with no rate increase on higher usage.
One of the very few good things about my location.
We have corn too...

 

[PJ Diaz]

Ahh k. Thought I read they were 180lm.

Yeah, luckily I live in the crappy midwest, so electric is cheap. 11.4 cents/kWh with no rate increase on higher usage.
One of the very few good things about my location.
We have corn too...

That is cheap. My lowest tier is 20 cents, and it gets as high as 50 cents. Every watt matters. I spent $250 on a solar kit just to run my fans off grid lol.

These are the diodes that are generally used for "281b's"..