Lighting Less odor with led?

[Black Sail]

That's really interesting man! I've been in the LED industry for a few years and I haven't heard this before. It's possible that the LED you're using isn't matching the intensity of the HPS you used before... What wattage HPS were you using before and what LED did you replace it with?

Lowering the temperature in your grow room will definitely decrease the volatility of your terpenes. Less terps in the air = more terps on your buds, I'm really interested in how they'll turn out after curing. LED's have been shown to increase terpene and cannabinoid content, here's why:

This is the McCree curve, this scientist named McCree measured how well Cannabis uses each individual wavelength of light. He plotted the results into a graph and it came out looking like this:

This is what PAR, PPF and PPFD are based on. Now check out the graph of some full-spectrum COBs:

It matches really close, that's why full spectrum LED's are so beneficial for your plants. Compare that to the spectrum of HPS and MH and you can see why I'm pretty confident that it's not a spectrum issue:

So if it isn't spectrum it's got to be light intensity, temperature or some other aspect of the garden that's indirectly related to the light. It could be a nutrient issue, switching from HPS to LED's will have some effects on the nutrient requirements of your plants. A lot of growers say their plants need more CalMag under LED's....

I hope that helps, can't wait to see how the cure goes:smoking:

-Keith

 

[STILLSMOKIN]

That's really interesting man! I've been in the LED industry for a few years and I haven't heard this before. It's possible that the LED you're using isn't matching the intensity of the HPS you used before... What wattage HPS were you using before and what LED did you replace it with?

Lowering the temperature in your grow room will definitely decrease the volatility of your terpenes. Less terps in the air = more terps on your buds, I'm really interested in how they'll turn out after curing. LED's have been shown to increase terpene and cannabinoid content, here's why:

This is the McCree curve, this scientist named McCree measured how well Cannabis uses each individual wavelength of light. He plotted the results into a graph and it came out looking like this:

View attachment 1026896

This is what PAR, PPF and PPFD are based on. Now check out the graph of some full-spectrum COBs:

View attachment 1026897

It matches really close, that's why full spectrum LED's are so beneficial for your plants. Compare that to the spectrum of HPS and MH and you can see why I'm pretty confident that it's not a spectrum issue:

View attachment 1026899

So if it isn't spectrum it's got to be light intensity, temperature or some other aspect of the garden that's indirectly related to the light. It could be a nutrient issue, switching from HPS to LED's will have some effects on the nutrient requirements of your plants. A lot of growers say their plants need more CalMag under LED's....

I hope that helps, can't wait to see how the cure goes:smoking:

-Keith

Typically LED grows are much cooler and dont emit heat like MH or HPS, if you crank heat up to about 80 with LED its stinks like crazy

 

[Arthur]

Yep... moved to led a year ago, big challenge for me walking in to mid 80s...
All about leaf temps... your plants are cooler in the same environment.

 

[automan2]

Update to my earlier post.
Being retired from the chemical industry, and spending years in quality control with the nuclear industry, I am familiar with documenting and interpreting data as it relates with reality.
I've raised my tent temps and noted a slight increase in smell but the jury is still out on potency.
I changed from 400w hps to 1200 "advertised" LED watts.
It has shown increased growth and denser buds, but not 3 times more.
I've added an Autocob and am still evaluating those results.
Potency is what I'm most interested in.
If I were a LED supplier, I'd tout all advantages too but let's face it, if those monster buds have less potency, then what? I prefer getting baked with a coupla pipe hits rather than whole lid !!!

 

[STILLSMOKIN]

Update to my earlier post.
Being retired from the chemical industry, and spending years in quality control with the nuclear industry, I am familiar with documenting and interpreting data as it relates with reality.
I've raised my tent temps and noted a slight increase in smell but the jury is still out on potency.
I changed from 400w hps to 1200 "advertised" LED watts.
It has shown increased growth and denser buds, but not 3 times more.
I've added an Autocob and am still evaluating those results.
Potency is what I'm most interested in.
If I were a LED supplier, I'd tout all advantages too but let's face it, if those monster buds have less potency, then what? I prefer getting baked with a coupla pipe hits rather than whole lid !!!

Potency is in strain and enviroment, if you are wanting more trichome coverage add some 6500k or higher spectrum. I have a mixed spec from 2700k all the way to 6500k and have no issues with potency. My buds look like frosty mountains, but before 6500k it was decent just no where near what I was seeing here with same strain. 6500k was the only thing I added and wont go without it now.

 

[automan2]

I plan to add another autocob next month as the difference in my plants since adding the single autocob has made me a believer. I'm finishing a Barneys Farm Pineapple Express auto and a Sweet Seeds Gorilla Girl photo and then I intend to turn everything up to 18/6 for my next batch of autos which includes a Nirvana Blue Mystic, 2 Stones Collection Moon Tears and a Stones Auto mix. These new lights are gonna make watching the girls quite exciting.

 

[AutoWonders]

I was growing with mass built led lights for a long time before changing to Autocobs. I rarely got odorous or sticky buds and my stuff has been plenty potent. Certainly as good, if not better, than any dispensary goods I've tried. I felt that my very low humidity is what was allowing for lack of odor and stickiness. I will find out next run as I have been able to finally raise my humidity to the needed percentages.