What light spectrum for autoflower ak47

i am startin my grow this week and was wondering what spectrum of light is required?

i hav just ordered a 250w envirolite cfl (blue/6500) and now wondering if you just use the red light all the time

General concensus seems to be blue spectrum for vegging and red spectrum for flowering.
I don't know for certain if this changes for autoflowering plants but I would think you still would want some blue tint in there at the beginning to promote some growth or you might wind up with a tiny little plant

ive never thought about it before, i bought the blue one thinking that would be the right 1 as at first at plant needs to veg which is the blue spectrum, then i thought if it autoflowers itself do i actually need to change the bulb ?

"General concensus seems to be blue spectrum for vegging and red spectrum for flowering." - Are you sure that one is right ?

As far as I know, red spectrum is for vegging (miming summer sunlight) and blue spectrum for flowering (miming autumn light). If I'm mistaking I'll just have to apologize. But I remember I red one "how to" topic here somewhere and it said the same thing (red - vegging | blue - flowering).

darklordmesiah said:

"General concensus seems to be blue spectrum for vegging and red spectrum for flowering." - Are you sure that one is right ?

As far as I know, red spectrum is for vegging (miming summer sunlight) and blue spectrum for flowering (miming autumn light). If I'm mistaking I'll just have to apologize. But I remember I red one "how to" topic here somewhere and it said the same thing (red - vegging | blue - flowering).

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am pretty certain its blue for veggin and red for flowering

Oh, damn. Then I just fucked it up I'm sorry

With CFLs, you need the DUAL SPECTRUM, red and blue spectrums. That does not refer to the color of the bulb that you see. It refers to the kind of rays, like UVA or UVB, or the color temp, called kevins.
CFLS come in 2700 kevins, 3000, 4100, 5100, and 6500.
Low Kevins, the RED Spectrum, like a 2700k is for BLOOM OR FLOWERING , 6500k is the VEG Blue Spectrum. The others are "MID" spectrums or in between.
IF you use the MID-range bulbs (4100) then also use the 6500 and 2700s.
In outdoors, the sun produces different rays in the spring (VEG Rays called Blue) and late summer for Bloom spectrum, the RED spectrum.

Color rating - Measured in Kelvin (K). The higher the number, the more bluish the light. 4000K-7000K is mostly on the blue side of the spectrum for Vegging or GROWING, while 3000K and under goes from a white spectrum, to a redder spectrum and is best for BLOOMING or FLOWERING.



This pic shows both COOL WHITE and WARM WHITE, or high and low kevin bulbs:

Roseman said:

With CFLs, you need the DUAL SPECTRUM, red and blue spectrums. That does not refer to the color of the bulb that you see. It refers to the kind of rays, like UVA or UVB, or the color temp, called kevins.
CFLS come in 2700 kevins, 3000, 4100, 5100, and 6500.
Low Kevins, the RED Spectrum, like a 2700k is for BLOOM OR FLOWERING , 6500k is the VEG Blue Spectrum. The others are "MID" spectrums or in between.
IF you use the MID-range bulbs (4100) then also use the 6500 and 2700s.
In outdoors, the sun produces different rays in the spring (VEG Rays called Blue) and late summer for Bloom spectrum, the RED spectrum.

Color rating - Measured in Kelvin (K). The higher the number, the more bluish the light. 4000K-7000K is mostly on the blue side of the spectrum for Vegging or GROWING, while 3000K and under goes from a white spectrum, to a redder spectrum and is best for BLOOMING or FLOWERING.



This pic shows both COOL WHITE and WARM WHITE, or high and low kevin bulbs:

Click to expand...

i got some autoflowering ak47 seeds givin off a friend and have just bought a blue spectrum bulb, should i just normal seeds that require blue and red bulbs or use these autoflowering seeds and veg them with blue and buy a red spectum bulb and start flowering after a month ??

On several auto-flowering threads here, it says to use the DUAL SPECTRUM, or BOTH, 50-50. IF you have more of one than the other, use more low kevin bulbs, like the 2700 k. VERY Cheap at Lowes too, $15 each for the 68 watt 2700 k bulbs. $10 or $12 for the Reflectors.





and get one of these extensions:

and if you want to add two lights to a reflector, you get a Y spliter.

i dont really have any money at the moment to buy a dual spectrum bulb because ive just ordered a 250w blue spectrum kit on monday, does any 1 know if it would work if i vegged wiv the blue 1 then just bought a red bulb in a month and flower it

or would u suggest saving a bit of money for a dual spectrum bulb or just sack the autoflower seeds off all together n just use normal seeds and veg and flower with 6500 and 2400 ? which is what i was goin to do in 1st place but got seeds given to me

Add some Lowes $15 68 watt 2700 K when you can afford them, for Flowering.

You really need BOTH, especially for Flowering.

Dual = TWO

Ok, sorry for insistance, but I'm starting to get worried. The cfl I bought has some sort of warm light (orange-white if you know what I mean). Is this the spectrum for vegetative stage ? Because if it's not, then I'm having a problem and it means I just started flowering on my 7 days old plant . Orange-white light is red spectrum or blue spectrum ? I just red that the color of the bulb has nothing to do with the spectrum color. This would mean that my orange-white bulb is not on red, but on blue spectrum, and that would be ok for vegetative stage, as you said. I'm asking all these things becuase the idiot manufacturer didn't mention the Kelvin value on the envelope. Sorry again for being persistent, but I really am a little scared ... Thanks for help.

darklordmesiah said:

"General concensus seems to be blue spectrum for vegging and red spectrum for flowering." - Are you sure that one is right ?

Absolutely Right!

As far as I know, red spectrum is for vegging (miming summer sunlight) and blue spectrum for flowering (miming autumn light). If I'm mistaking I'll just have to apologize. But I remember I red one "how to" topic here somewhere and it said the same thing (red - vegging | blue - flowering).

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the Spectrum color is NOT visable.
WARM WHITE (pale) and COOL WHITE (bright white) is one way to determine the difference.

WARM White is the Low Kevin
Cool White is the High Kevin

darklordmesiah said:

Ok, sorry for insistance, but I'm starting to get worried. The cfl I bought has some sort of warm light (orange-white if you know what I mean). Is this the spectrum for vegetative stage ? Because if it's not, then I'm having a problem and it means I just started flowering on my 7 days old plant . Orange-white light is red spectrum or blue spectrum ? I just red that the color of the bulb has nothing to do with the spectrum color. This would mean that my orange-white bulb is not on red, but on blue spectrum, and that would be ok for vegetative stage, as you said. I'm asking all these things becuase the idiot manufacturer didn't mention the Kelvin value on the envelope. Sorry again for being persistent, but I really am a little scared ... Thanks for help.

Click to expand...

WARM WHITE (pale) and COOL WHITE (bright white) is one way to determine the difference.

WARM White is the Low Kevin, Red Spectrum, Flowering
Cool White is the High Kevin, Blue Spectrum, VEGGING

Both cycles, VEG and BLOOM, need the DUAL Spectrum, or BOTH Spectrums. All new growers should know this before they start a grow.

Roseman said:

WARM WHITE (pale) and COOL WHITE (bright white) is one way to determine the difference.

WARM White is the Low Kevin, Red Spectrum, Flowering
Cool White is the High Kevin, Blue Spectrum, VEGGING

Both cycles, VEG and BLOOM, need the DUAL Spectrum, or BOTH Spectrums. All new growers should know this before they start a grow.

Click to expand...

so wot till happen if i use the 250w blue envirolite ive bought for vegging and after a month or so buy a red 250w bulb and swap them over for flowering ??

i thought that was the way to do it, didnt know you need both spectrums on during process

Fluorescent lights: Fluorescents are far more useful than incandescents. They are efficient enough, and much less expensive than HID (High Intensity Discharge) lights. Compact fluorescent tubes, (commonly called CFLs) are popular with growers because of their good output to size ratio. Compared to standard 4 foot tubes, CFLs are smaller, more easily moved, and more can fit into a given small area. CFLs are good for small grows on a tight budget, and for novice growers, since they do not require any special sort of wiring or understanding of the necessary bulbs for a given fixture, and the small wattage ones (23, 42 and 65) are very widely available. Fluorescent lights come in many different Kelvin (spectrum or color) ratings; often the spectrums are labeled on packaging as being 'cool white' or 'warm white.' Cool white is more blue, and is good for the vegetative stages of growth. The bulbs are ultra white. Warm white light is more reddish in spectrum, and is best for the flowering stage. The bulbs are almost cream colored.

Color rating - Measured in Kelvin (K). The higher the number, the more bluish the light. 4000K-7000K is mostly on the blue side of the spectrum for Vegging or GROWING, while 3000K and under goes from a white spectrum, to a redder spectrum and is best for BLOOMING or FLOWERING.

In all stages or cycles, DUAL Spectrum is BEST.

djh said:

so wot till happen if i use the 250w blue envirolite ive bought for vegging and after a month or so buy a red 250w bulb and swap them over for flowering ??

i thought that was the way to do it, didnt know you need both spectrums on during process

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using the wrong spectrum now will just be less efficient. I've seen growers use ONE 27 watt CFL for one plant, durign both cycles. It lived and bloomed and budded, but it was a runt.

Roseman said:

using the wrong spectrum now will just be less efficient. I've seen growers use ONE 27 watt CFL for one plant, durign both cycles. It lived and bloomed and budded, but it was a runt.

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i only plan on growing 3 plants so 250w should good for them plants shudn't it, thats 83 watts per plant or even if i just grow 2 thats 125 a plant

I used a t5 flouroscent with red spectrum all the way through growth.

It is over a foot tall very bushy and is budding great. It is more important to have the proper spectrum for flowering than veg in my mind.

I veg just fine with warm light half blue and half red is best during veg and early flowering, but when your about two weeks into flowering you should change to all red.

The autoflowering behavior of the plant comes from Ruderalis,
which grows in places where "Summer" and "Winter" don't
have much to do with the sunlight.
This suggests you could just keep your 6500K on at 20/4 or 24/0
and it won't affect growth.

A lot of seed sites describe Autoflowers as "they completely
skip over the veg phase and are in the flower phase as
soon as the seedling pops her head above ground."
This suggests that you'd want your HPS-type light from day one.

Yet a third knowledgeable source says that you should
use the same lights as when growing a normal plant, EXCEPT
that the autoflowering plant will tell you when to change to HPS.
When you see the plant starting to flower, change to HPS.
(it's kind of like the plant deciding to SOG instead of the grower).

My conclusion: the K temperature of Summer sunlight is high in the Summer
whether you are in Africa or Alaska. Only the hours of day and night
differ with change of season.
Give the autoflowering plant vegetative light until you see flowering,
then give it flowering light.