Full spectum lights vs Other

Is there any disadvantage in growing under full spectrum as opposed to a veg light and a flowering light? I assume thre must be otherwise it just seems like you are making it harder for yourself , dealing with swapping lights.

Are yields lower?

If switching out light bulbs is a pain in the butt for you, don't grow Cannabis. Switching bulbs is the least part of my work lol. I didn't quite understand the question? If you don't want to switch bulbs you can veg under hps and flower under same.. Or veg under mh and flower under the same .. Hps gets best yield

yeah bro i have a duel spectrum 250w grow lush bulb 70flower/30veg that i sumtimes run but usaly i just run my full red/orange spectrum hps phillips master 250w pia plus i found my buds were alot larger and denser higher quality buds in flower but ive read alot about them both and alot of poeple take the duel spectrum over the full i only found it grew the buds faster continously vs my usaly 3 big bursts but bigger glads and buds, i do veg under my full spectrum but you can get crazy stretch between nodes,um as for yeilds im not sure i never noticed i supoze it depends on training and nutetrients for yeild more than anything thats my take on things

tarks said:

Is there any disadvantage in growing under full spectrum as opposed to a veg light and a flowering light? I assume thre must be otherwise it just seems like you are making it harder for yourself , dealing with swapping lights.

Are yields lower?

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Yes the yields are lower, but the herb is so much better

full spectrum is better abs yields are the same. I grow with induction , led, and cob led. All my lights are full spectrum. My led panels have white leds that are full spectrum. I get the same yields as hps. But far better quality and higher THC%. You want high par and high cri. The higher the cri the more even the spectrum and closer to the suns spectrum. The better the results . All my lights are 80-95 cri. 800- 1200 µmole/s. Hps has the same par but 25-35 cri.

Dual spectrum bulbs are a pretty penny. If they were all that and a bag of tricks I assume more of the good growers would be using them.

I'm currently doing a side-by-side comparison between two Pineapple Express clones grown in two different flower rooms. The only variation between the two is one is under a combination of 400w MH and 600w HPS while the other is under 2 600w HPS. My focus is on bud density as I've always felt dual spectrum contributed to nice dense buds.

The plants are 3 weeks into 12/12 and here's how they look as of today:



The one on the left is under the two 600w HPS's....the right....dual spectrum MH/HPS

The goal is to mimic the spectrums of light the sun would produce at certain times if the the year.

I understand.....I'm not attempting to indicate that my little comparison is all the relevant to this thread, just wanted to show the differences....if any.....of dual vs. single light spectrum effects on a pot plant..

Cpappa27 said:

The goal is to mimic the spectrums of light the sun would produce at certain times if the the year.

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the sun is the same spectrum year round. The only change is the distance from the sun. Over the middle east the sun puts out uv-b . In the U.S. it does not. Using an mh during veg and hps during flower is one of the biggest marketing schemes in the industry. To make people buy 2 lights instead of one. You want the same spectrum in veg and flower. Full spectrum.

hyroot said:

the sun is the same spectrum year round. The only change is the distance from the sun.

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I beg to differ,

The proportion of each day in which the sun is at a lower angle of incidence (closer to the horizon) increases through fall, winter and then drops in spring thru summer.

The sunlight is therefore filtered tangentially through a 'thicker' amount of atmosphere in the colder seasons. The scattering of blue light by the air results in a higher proportion of red light being transmitted to the earth's surface in comparison to the reduced level of blue.

So in autumn and winter to early spring the red spectrum is enhanced.

Please correct me if I'm wrong.

Chester da Horse said:

I beg to differ,

The proportion of each day in which the sun is at a lower angle of incidence (closer to the horizon) increases through fall, winter and then drops in spring thru summer.

The sunlight is therefore filtered tangentially through a 'thicker' amount of atmosphere in the colder seasons. The scattering of blue light by the air results in a higher proportion of red light being transmitted to the earth's surface in comparison to the reduced level of blue.

So in autumn and winter to early spring the red spectrum is enhanced.

Please correct me if I'm wrong.

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the distance makes it so in late summer and fall 730nm IR is present at sunset. Clouds and atmosphere an what not block light. The sun still produces the same spectrum. The atmosphere and distance may change what we see. The sun still produces the Same spectrum. The yellow sun doesn't turn blue. Over the middle east uvb gets through b
because of the hole in the ozone layer.

plants also absorb wave lengths we don't see. Why lumens really means nothing except in design applications of light.

I agree with Hyroot. Full spectrum for quality, add intensity for quantity.

mc130p said:

I agree with Hyroot. Full spectrum for quality, add intensity for quantity.

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I agree with that of course - only an idiot would dispute that... but I still think plants would see more red in fall/winter and more blue in late spring - summer.

But as long as we grow what we like to smoke, its just potatoe - potato

hyroot said:

Over the middle east uvb gets through b
because of the hole in the ozone layer.

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We have a hole in the ozone layer down under too, but I don't think its getting through to my plants growing in my cave 8(

Chester da Horse said:

We have a hole in the ozone layer down under too, but I don't think its getting through to my plants growing in my cave 8(

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I heard its unbearably hot in the deserts there. That would make sense. When my cousin was in Afghanistan (marine) he said there was 2 temps there. Sub zero and volcanic. If its anything last like that in Australia.. .

hyroot said:

I heard its unbearably hot in the deserts there. That would make sense. When my cousin was in Afghanistan (marine) he said there was 2 temps there. Sub zero and volcanic. If its anything last like that in Australia.. .

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nothing an ice cold beverage and a big phat blunt can't help you deal with . Plenty nicer than afghanistan down here!

I wish we had ganja gone wild like they do over there, or at least legalised access - i like ur SB420 compliance, is that for real? 420?

Chester da Horse said:

nothing an ice cold beverage and a big phat blunt can't help you deal with . Plenty nicer than afghanistan down here!

I wish we had ganja gone wild like they do over there, or at least legalised access - i like ur SB420 compliance, is that for real? 420?

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Yep California senate bill SB420. Which passed in 2003. Which set the guidelines for plant numbers an weight. The supreme court set a preceden in 2011 or 2012 that you can go beyond those plant numbers. There's alot of patients, that 6 plants isn't enough to last...

hyroot said:

I heard its unbearably hot in the deserts there. That would make sense. When my cousin was in Afghanistan (marine) he said there was 2 temps there. Sub zero and volcanic. If its anything last like that in Australia.. .

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that's pretty much how it is in jordan and kuwait...it's either cold or you live in a dusty clothes dryer...sometimes it's muddy