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Back to Grow Questions
LED light distance during germination and throughout.
iLuvBlaznMJ
started grow question 6y ago
How high should I hang VipraSpectra PAR450 lights above the top surface of soil during germination?
Solved
Setup. Lighting
likes
Mr_Weeds_Autos
answered grow question 6y ago
Start at 36"inches and work your way to 18" as the plant grows.
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Complain
Selected By The Grower
Similar Grow Questions
Solved
Dillsnills
Opinions on my setup and if it's over kill to run a ViparSpectra P2000 and XS1000 for my 2 Glueberry Og Auto's?
Need opinions on my setup, I'm running a ViparSpectra P2000 true 200 watt and XS1000 true 120 watt, I have 2 Glueberry Og Auto's going, week 3 of flowering, I don't have issues w heat or humidity at the moment, is this overkill with the lights or should it be good?
Plant. Other
Setup. Strain · Autoflowering
Setup. Lighting
5y ago
3
3
Solved
Sugahmama
OMG
My Timer malfuntioned and gave them over 22 hrs of light?I was wondering why they kept growing this fast and big until i controlled the system and noticed they get to much light and stretching this hard. So i turned the hrs down to 16 to stress them into blooming, will this Work?
Week 7
Buds. Other
Leaves. Too many
Setup. Lighting
3y ago
8
6
Solved
kaiabel
Help, they start to taco.
I think its to bright and to hot, seeing some taco leaves. Sanlight on 100% for few days, temps go up to 32C Next plan is to add BB Grow,Bloom,CalMag,TopMax,BioHeaven,Activera,Algamic no Canna Mono Mag anymore. What do you guys say to feed? Light back to 80%? https://growdiaries
Leaves. Veins · Stay green
Leaves. Color · Pale
Setup. Lighting
4y ago
1
3
Solved
Pagus
Yellowing leaves after first Mainline top. Light stress?
Just checking in here, I am pretty sure this is light stress. it was at 18" (specs say 18-24" during veg) and she was likely pretty stressed after having her top cut off!!! I have raised light to 23". Am I on the right track here?
Leaves. Color · Yellow
Setup. Lighting
Techniques. Main-lining
5y ago
1
3
Solved
Blueboy2019
Help with lights LED
HELP HELP HELP LED lovers Best led light or lights for a 1mby2m tent... price under £500
Setup. Lighting
6y ago
1
5
Solved
Girl_Scout
Light stress during the night time
Question to outdoor growers. The auto flowering plant is growing in the garden, and sometimes there is light on during night time, can it cause light stress? It's usual light bulb, 40w, in some distance
Setup. Lighting
Setup. Outdoor
3y ago
2
2
Solved
ganzigunnu
Vegetative Plants and UV?
as my plants grow bigger I added the second light in the tent but that one doesnt have switches for UV, IR so when I plug it in all the bulbs are working. My concern is to hurt them with this because they are still in the vegetative phase. Is there anyone who knows about ths stuf
Week 5
Setup. Lighting
5y ago
5
3
Solved
MrJoint
Distância e potência do Led
For the seedling stage: Is the LED power at 25% (mars hydro TS1000) and a distance of 60cm from the plant adequate, or can I reduce the distance for better growth during this stage??
Week 2
Setup. Lighting
6y ago
3
Solved
BENY_TRUBY
Espectro de luz en automáticas
When should I switch the growth bulb to flowering? I have some outdoor autos that I give extra lighting to inside the house when it's night. The bulbs are 55w CFL neons, and so far (5 weeks) I've always used the CFL with the growth spectrum.
Setup. Lighting
4y ago
2
Solved
Meimei99
light HYDRO FARM and SPIDER FARM where is my best choice for 400$
I want to grow about 10 plants in my house, with an area of 8x3 ft, I like the choice of light HYDRO FARM and SPIDER FARM where is my best choice for 400$ please help me for this it's my first time planting !! Thanks bro!!!
Setup. Lighting
5y ago
3
3
Solved
Fletchy
Seedling light height?
My marshydro tsw2000 is set to 100% how far should it be above seedlings? Currently 50cm / 20inch
Week 1
Setup. Lighting
3y ago
2
Solved
MaestroBud
Mars Hydro ADLite 100W Under Canopy Advice – Experiences and Controller Compatibility?
Anyone tested the Mars Hydro ADLite 100W Under Canopy? Worth it? In 120x120x200 tent, better use 1, 2, or 3 units? Can I daisy-chain them and control with Phlizon Wi-Fi controller (link below)? Setup: 4 fem plants, DripKit, FD9600. Tips or feedback appreciated! 🙏🌱
Setup. Lighting
1y ago
2
1
Solved
Italy_Grower
Reverse flowering time
could I reverse the time when putting into bloom and switching from a 12/12 program? I could turn on at 00:00 and turn off the light at 12:00, because honestly I keep them on during the night and I turn them off at noon and I would like to do the opposite, can I?
Other. Other
Setup. Lighting
5y ago
5
5
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
4y ago
5
3
Solved
GermanGrows
Light height
Hello all I have a mars hydro tsw 2000. I was noticing the recommended height is 24 inches for seedlings. Is this at 100% intensity? That's well over 1000 ppfd by my meter. I thought seedlings could only handle 200-400?
Setup. Lighting
5y ago
1
Solved
giggi
First questions about light
Since I'm using a chinese 50W led grow lamp , what is the right distance from the plant? I'm doing 18-6, but since she looks little for her age, would be useful to turn 24-0? many thanks for your help
Week 1
Setup. Lighting
6y ago
1
2
Solved
Greenlady
Grow light
Is this any good? For a 2x4 closet. Green crack auto and kush xxl auto. Thnx.
Setup. Lighting
7y ago
2
3
Solved
Abacus
Invert light/dark during a grow
For veg period is better if I start with light on in the day, and off in the night, but for bloom period it will be too cold, can I invert light/dark during a grow? I will have light on in night and light off in the day.. does the plant have any problems if I do that?
Setup. Lighting
4y ago
6
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
Mel_Macallan
Led mounted on side wall instead of top
So I'm thinking about to build a pc grow box, just for seedlings. When they start to be bigger I'll move them to bigger grow box. I have a spare grow light but it's to wide to mount in top of grow box. So I was wondering if I could mount it on the side wall?
Setup. Lighting
6y ago
4
6