Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Ppfd?
2x2growing
started grow question 6y ago
What ppfd do you guys recommend for plants in veg? I’m finding that my light can be too strong at max power even at a 24” distance.
Solved
Week 6
Setup. Lighting
likes
HeavyHittah
answered grow question 6y ago
250 PPF for seedlings 400 to 600 for veg 600 to 850/900 in flower.
1 like
Complain
Selected By The Grower
GMSgrows
answered grow question 6y ago
Put your hand under the light at the height of your canopy., if your hand feels comfortable under the light for 1 minute then your girls will be fine. Cheers
2 likes
Complain
Similar Grow Questions
Solved
iiswiftt
Auto Light Cycle
Can you switch an autoflower to 24/0 during flower?
Week 8
Setup. Lighting
5y ago
3
5
Solved
fadagrow
Mars hydro Fc4800 hanging distance and power %
Hi, I see different advices on the hanging distance and power % for the marshydro fc4800 , any recommandation for each stages ? Thanks in advance for any advice from the FC4800 users will be really welcome 🤗. Thanks Fada
Setup. Lighting
4y ago
2
Solved
kevgrow
Day 3 - Seedling Stage - how much light is needed
First Time Grower - Day3 Seedling Stage Using roots organic soil and Mars Hydro 1000,, im not sure what strains they are, hoping one is a female 1- how much light is needed at this stage? Currently set at 355 Lux x100 2- should i set it to 18hrs / 6hrs or just 24/hr of light?
Setup. Lighting
6y ago
2
2
Solved
yourbestbud
Light too hot
I got a Lumii hps 600 watt light I have a fan and a small extractor fan in my tent but temperatures were too high (44 degrees Celsius) how can I cool my tent ? Ducts etc?
Setup. Lighting
3y ago
3
3
Solved
Brebzzz
Put light
i put the seed in the soil , can i put some light ( right now i put them under 20 /100 intensity under the spider light ) i have right or i do something wrong ? thx for the answer
Setup. Lighting
6y ago
3
4
Solved
Noahbear
Are my leaves light stressed?
Are my leaves getting too much light? They seem light stresses. Any input would be great- thanks
Leaves. Color - Yellow
Setup. Lighting
4y ago
3
2
Solved
Hou_Stone
HID 600w ?
Actuellement j'utilise 400w dans mon 1m². Vous pensez que c'est intéressant de passer mon ampoule en 600w ? Ou c'est trop pour 1m²? Je vais passer en floraison la semaine prochaine.
Week 6
Setup. Lighting
3y ago
1
1
Solved
WeedManz
Light help
Do you think I should bring the light any closer?
Week 2
Setup. Lighting
4y ago
5
5
Solved
BullWeedDog
Cuando y como pasar mis plantas a floración??
Voy a pasar mis plantas a floración 12/12, he leído que la dejan 48hrs sin luz para forzar la floración esto es bueno o lo paso y ya?? Y tengo un balastro gradual lo tengo en 400w al cambiar a 12/12 lo coloco en 600w o espero a la segunda semana de floración para pasarlo a 600w??
Other. General questions
Plant. Other
Setup. Lighting
4y ago
2
2
Solved
Rush2112
Less light for an auto? Maybe 12/12?
Been going with 18/6 for my cream autoflower from growers choice from Day 1. Now 5 weeks into flower I’m wondering if she would benefit from less light, like 12/12, as you would for a photo period plant. What do you think? Would she be happy flowering in some more dark period?
Setup. Lighting
6y ago
1
2
Solved
bobh2
leds 50w em fonte 250w queima?
To buy leds cob 42-48W 36-39 V 1200mA 3500k, and to cut costs, I want to use a 250W step up with a 24v 20A 250W switching power supply, if I connect 5 cob leds will the leds burn out?
Setup. Lighting
Setup. Other
6y ago
2
2
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
Frezzy
Growlampe
Hallo an alle, Ich bin schon länger auf der Suche nach einer guten Growlampe die auch mehrere Pflanzen ohne Probleme hochziehen könnte. Habe schon vieles gutes über die Mars Hydro TS600 gehört ist die Lampe besser für einzelne Pflanzen oder kann man auch mehrere hochziehen?
Setup. Lighting
2y ago
3
3
Solved
nd-grower
is using 2 spectrums ok while vegging?
will it hurt to have my xs1500s going along with a 600w purple light running as well?
Week 2
Setup. Lighting
5y ago
3
3
Solved
Sativa_Juice_Grows
Lighting Question
If anyone has a Mars Hydro tsw2000 light can you tell me what the function of the two switches are? The only thing i could find was something saying that one is better for veg and one is better for flower. Can anybody tell me which one is which? cant find much online to help.
Week 8
Setup. Lighting
5y ago
1
2
Solved
The_garden_of_Vixen
Lamp distance
Hello. I have a question about my lamp distance. I’ve changed the lamp to MARS HYDRO 2023 TS600 LED a week ago and a distance to the plant was 18 inches. During this week a plant grew and the distance became 12 inches. I lifted the lamp to 13 inches. What distance I have to keep?
Week 6
Setup. Lighting
3y ago
3
2
Solved
HAPPY91
Maxsisun PB Grow Light?
Anybody use Maxsisun PB lights for flower?
Setup. Lighting
6y ago
3
Solved
KnightRider
Led safety
Hi Peeps, My Mars Ts600 is getting on a bit and a quarter of the leds have gone, would you say its safe to continue using the panel? Thanks
Week 6
Setup. Lighting
3y ago
5
3
Solved
Catphish
Lights Got Stuck On When It Should Have Been Dark
I found last night that the timer for my lights got stuck on for close to 8 hours past when it should have been in dark period. I immediately turned them off and put it on dark for 12 hours. What do else do I need to do or look out for? Is re veg a high possibility?
Week 14
Buds. Other
Plant. Other
Setup. Lighting
6y ago
3
3
Solved
ganjermaster
Algun LED para 170x170x270?
Alguien me recomienda un LED de máximo 650€ para 170x170x270? En habitación sin armario
Setup. Lighting
6y ago
3