The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Licht umstellen bei Photoperioden!!!!!
Bandit600
started grow question 3y ago
Hi liebe Grower, Was ist das beste Lichtplan für Photoperioden wenn man sie von 18/6 auf 12/12 , 13/11 oder 11/13 umstellt. Danke 👍
Solved
Setup. Lighting
likes
Organoman
answered grow question 3y ago
18/6 then 12/12.......there is no other. Sometimes if you have a plant with heavy Sativa genetics, you can go to 11/13 to help them finish more decisively and prevent continual re-flowering at the end (last 2-3 weeks).
likes
Complain
Selected By The Grower
Aquemini
answered grow question 3y ago
Once your happy with the plant size in vegetation, you should just flip straight to 12/12. That’s the most common practice for flowering.
likes
Complain
doctaganja
answered grow question 3y ago
I recomment direct to 12/12 when i want ur photoperiod get into flower
likes
Complain
Zurban_Poison
answered grow question 3y ago
I usually put it like this: 12.5 o'clock at night and 11.5 light.
likes
Complain
Similar Grow Questions
Solved
Kitties_and_Colas
48hr dark period before harvest: Yay? or Nay?
I always get mixed answeres on this,.some swear by it while other's say it does nothing.We tried it only once and found no notable difference..I'll leave this question open for a bit,i'm currious to hear some differing opinions and maybe a little science, ty guys❤️😻~Ms.Cats
Week 13
Other. Other
Setup. Lighting
4y ago
8
5
Solved
GrowsInTents
What lights for a 2'x3'x6' tent?
What light or lights for a 2x3 footprint? Veg and flower. Deciding between 2x Viparspectra XS 1500, 2x HLG RSpec 100, or a combo 1 of each. Budget is 200-300ish. Cheaper is better. Open to suggestions. Not sure if I should have 2 of the same lights or mix n match.
Setup. Lighting
2y ago
8
9
Solved
Grow4Releaf
General question about raising lights.
Gotta question for what most of you are doing to raise your lights? Currently I've just set it static and move as needed. But I'm curious if anyone has a easier method or know of anything made to aid in the raising of the LED light fixtures ?
Setup. Lighting
3y ago
5
5
Solved
Bebiboukush
Lightning and grow box?
Hey, thanks for the answers about the pot, now I'm wondering about the lighting.So if the germination goes well, we'll have 6 plants, what type of light do you recommend?For now we have 3LEDbulbs of 12W, I think we need to upgrade... And Is the grow box a great idea?(size?)thanks
Setup. Lighting
5y ago
2
1
Solved
G46Go
Second light in one tent
3 fan, 1 carbon filter, humidifier works inside and the tent is 120x120. I have 1 240w qb inside, i like it but i want more yield. So my question is i buy second 240w qb would it be good or it would disturb the balance? Also im afraid maybe electric bill will be too much to hide?
Week 6
Setup. Lighting
6y ago
4
2
Solved
2ofyn52aUdHza4Y
Can I use 18 on 6 off during flower when growing autoflowers and using ViparSpectra KS5000 LED at 100% power?
I have a tent with a ViparSpectra KS5000 LED lights. If I am growing autoflowers and they are in the flower stage do I have to change the light/dark schedule from 18 on/6 off to 12 on/12 off or will it be ok to keep the lights on a 18/6 schedule since they are autoflowers?
Week 4
Setup. Lighting
4y ago
2
3
Solved
kushman_4
Are these LED specs good enough to start my first ever small scale grow? HELP!
Hi, are these LED specs enough to start a small grow (maybe 2 plants): Full Spectrum 200W with peak Intensity RED 630-660nm & BLUE 440-460nm PPFD: 630.25 umol/s/m2 at 30cm 175.12 umol/s/m2 at 60cm 80.04 umol/s/m2 at 90cm This is for a 3x3' tent Any advise would be appreciated!
Setup. Lighting
5y ago
3
3
Solved
Pete420growdiaries
Switch to red or keep both?
Q: i have 2 switches on my light 1 blue for veg. and 1 red for flowering. Is it better to switch to red alone now I'm in bloom fase? For the grow fase was red and blue on, is it better now for red light or should i keep both on? All help welcome🙂
Setup. Lighting
4y ago
3
3
Solved
leo__bulero
How many plants in a 70x70x160cm tent with 100W?
Hello, I have a grow tent kit 2x2 with a 100W 301H EVO Spider Farmer light. I have put there three 11L pots. But now I realize the size/light of my tent might not be enough. Could I manage by adding an additional 60W lamp you reckon or is it best to discard at least 1 plant? Thx
Setup. Lighting
1y ago
2
1
Solved
GrowGirl419
This is my current grow. I have the 3, 4000w (or whatever) LEDss, does this looksound like enough light and in a decent position? I have several led small bulb lights I can place around if needed. What do you think?
Setup. Lighting
5y ago
2
5
Solved
Palancha
Light distance
Hi everyone, what distance from the light to the plant is recommended to start the vegetative period? I see many different measurements on the internet. In this case, it's for some automatic Red Poison plants, with a 360W LED light.
Setup. Lighting
1mo ago
6
7
Solved
hollyhustler
Is that just a light burn or could it be something else?
One bud in the middle of my plant is much lighter than all the others, which all look healthy and green. I think it was due to the too small distance of my light, which was only 20cm (8") between canopy and light. I have now moved the light to 35cm (14"). What are your opinions?
Week 8
Leaves. Color - Yellow
Setup. Lighting
5y ago
4
3
Solved
GlockAbuser
Nutrient burn, Light burn, or Phos Def? red stems purple bruises,
Noticed red lines leaking red into the leaves with purple bruising, and the starter bottom leaves seem to be turning yellow, with the leaves above looking dark green with spots. Is this signs of light burn or nutrient toxicity? And is it lacking phosphorus or just the strain gen?
Leaves. Color - Dark-purple
Plant. Stem - Red or purple
Setup. Lighting
2y ago
3
4
Solved
DWCbuds
Lights airstone c02
What light to plant distance would you set it at? The only test I've done is at 25 inches its stable at 80°f and 75% humidity. When I lower it to 18 inches, the tent read 85°f and 73 humidity. Other question I have is what's your favorite air stone(disk)? Lastly, add c02 yes/no
Week 2
Setup. Strain - Autoflowering
Setup. Lighting
Setup. Ventilation
5y ago
2
2
Solved
BarrelOfTheBong
Found a cheap light that I think would be perfect in my small tent, would it?
Would this light be good to add to my setup? (60W 55 draw cob in a 40x40x120cm tent) ://i.imgur.com/VTayXRu.png 4500 Lumen 4000 or 6400 Kelvin 50 Watt (I already know there is much better, but know I am asking about this one)
Setup. Lighting
4y ago
3
2
Solved
dauntless
LUX meter grow question
Can someone check out the LUX meter video and tell me how I should be positioning my lights? I think maybe I have too much light on them. My meter says 600 (x100) that puts me at like 60000 lumen. The converter I used put that to 1541.36 umol/s/m2 which is a lot of light already
Week 7
Setup. Lighting
4y ago
1
3
Solved
Cc4mo
12.0v LED strip effectiveness
Will this mini led strip help my other weak light out? Or is it wasted energy. I’m still putting the plant in the sun as soon as it gets onto my balcony but while it’s really cloudy and in the evening this is all I’ve got.
Setup. Lighting
4y ago
4
4
Solved
Vegas_Kind_Budz
Is 1’ away good for now? Personal experience opinions welcome
Ok Guys. My plants are 6 days old now. And I have them under this 72w light that is about 12” away from them. Is it ok to have it this close? I was considering to move it closer before moving to the hig light. Thanks for the opinions guys!!
Setup. Lighting
6y ago
1
4
Solved
MOcaver
Hello, I am using a viparspectra par1200 which has the veg and bloom adjustment knobs on autoflowers. My question is, should I only be using veg during veg and bloom during bloom? Or can I just turn that sucker on full blast the whole time? Thanks
Setup. Lighting
6y ago
2
5
Solved
BarneyRumble420
Opinions please
Anyone used the viparspectra p1000? And is it any good ??
Setup. Lighting
4y ago
2
4