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Back to Grow Questions
Light hours and luxes?
iwantabike
started grow question 5y ago
Can i use 24 hours of continue light, its a 9watt cfl, i used lux meter app and it says that seedlings are receiving 50000 lux, its that okay?
Solved
Setup. Lighting
likes
Pichu83
answered grow question 5y ago
For seedlings I always do 24h
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
Blueboy2019
5 hr power cut in flower
This morning my lights come on as they should but then I had a power cut for 5 hrs after the light been on for 1 hr in the morning. I'm 2 weeks into flower on a 12/12 ... What should I do? Start a fresh 12/ hrs so change up my timer or just leave them as their are??
Setup. Lighting
6y ago
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Migh_Lo_Beans
Should I lower my light during flowering?
I'm at 24 inches away now, should I lower the light now that she's in full bloom? I went with the recommendation of Mars Hydro and burnt up 3 seedlings as a result. Sadly I only have one bean left of my Fastbuds over this crucial mistake. Running a Mars Hydro SP 250 keep at 36in.
Week 5
Setup. Lighting
5y ago
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MangJs
Substrate Germination - lighting
Hi Growmies!, just a quick question on lighting on germination just want to know your methods. do you 18/6 lighting or 24 hours on germination period? is it worth doing 24 hours? whats your preffered method Thanks all
Setup. Lighting
Germination. Substrate
5y ago
4
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Solved
Insertcoin
Should i raise the lamp to force the strech?
I had the light the past few weeks 30cm over the plant on 100% wich has 930ppfd in 20h duration it was all together 65 DLI. I want to force the strech from now. Do you think i should raise the light up tp 50cm over the plant? The plant made nearly 20cm within the past weeks.
Week 5
Plant. Too short
Setup. Lighting
2y ago
6
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buddhi_coop
Grow Lights
Is it okay to use an LED Light 1000 watt (4x4x80" tent) & a UV Light 1000 Watt in a 4x4x80" grow tent for 3 plants. I want more light, I have plants growing slowly so I'm hoping to adjust the amount of light I have would speed up their growth. LED is white spectrum & UV blue-veg
Leaves. Tips - Burnt
Setup. Strains - Photoperiod
Setup. Lighting
5y ago
4
3
Solved
Dr_Perl_Junior
Hey folks, newbie here! Any experiences upgrading the older model of Mars Hydro TSW 2000 with a custom controller/dimmer for Home Assistant integration? Insights appreciated! Thanks!
Setup. Lighting
Setup. Other
2y ago
4
2
Solved
Clout_god67
Veg cycle-Blooming
Hi I ordered a mars hydro ts600w which is arriving either today or tomorrow. I also ordered light timers which I just switched from 24hrs to 18/6. My white widow is currently 5 weeks and my Alaskan purples are 4 weeks. I was wondering if I could start flowering by next week?
Setup. Lighting
5y ago
1
1
Solved
ZhugeTsuki
Can too much light in Veg cause EC to skyrocket?
Hello everyone, I have 4 plants in a 3x3 area under three of these lights - https://amzn.to/2MhseVH 360w all together which is what I expected to use during flower, I didnt realise that you dont need to use as much during veg, all plants have had to be flushed with EC's at 10
Week 7
Setup. Lighting
Feeding. Deficiences
6y ago
1
2
Solved
BBhykiem1
Start over or see this beast till it's end?
been weeks since it showed it first pistils and not much more, Roots fine, 24hr light time now at 100 watts due to light burn which I can't raise anymore, eats/drinks a gal a day on full strength nutes, ph 6.3, temp 65, humidity 50 -55 Gsc auto from garden of green seed bank
Plant. Too tall
Setup. Lighting
Techniques. Defoliation
3y ago
1
18
Solved
DennM39
Light distance from canopy
My 4x8 tent has two 2000watt led lights in it .. what’s a good distance to keep my lights above the canopy ?
Setup. Lighting
4y ago
1
1
Solved
StDeacon
Grow light?
I recently asked a question about 2 lamps. Here is another lamp that has less blue and red but much more white is sufficient for a plant or max 2
Setup. Lighting
5y ago
2
Solved
WeedDoctorSam
When to turn the light on after sprouting?
We have a sprout! Tropicana Banana sprouted between 10pm last night and noon today. Can I turn the light on now, and start the 18-6 schedule tonight or will it fuck it up if I turn the light back off at midnight tonight to begin the 18-6 schedule?
Week 1
Setup. Lighting
5y ago
1
2
Solved
Theia
1 light or 2
I have recently purchased a Mars hydro SP 3000. Great light.. It replaces my Blurple Mars hydro exo 120. I wanted to ask what peoples opinions are about me using both lights for veging. My grow space is not that big. 1.8m x 0.8m and 2.35m high. Will it be too much light and heat?
Setup. Lighting
5y ago
3
Solved
SaltCity
Does my LED need more red spectrum for flowerin?
I have an HLG 100v2 LED grow light at 4000K. They say 3000K is better for flowering. Does it make any sense for me to add some cheap red LED strips to add red spectrum? I’d rather not buy another more expensive light if I can just supplement this one. See picture.
Week 8
Setup. Lighting
4y ago
1
3
Solved
DrCris
Best grow light for a 3.5x3.5?
I'm disappointed with my last yield and belive its cause of the light. Want to invest in a better product. Which one do you think will produce the biggest yield with 4 autos in a 3.5×3.5 feet wide tent? - Lumateck Attis 300W - Mars Hydro TSW 2000 300W I want the biggest buds
Setup. Lighting
5y ago
2
2
Solved
GhettoStyle
And if it's not difficult, tell me how I should control the light at all stages of growth from growth to the end of flowering!? at what distance from the plants should the light be? and what power adjustments on the driver should I make?
Other. Other
Setup. Lighting
Setup. Other
3y ago
3
2
Solved
Skyhi
Light distance and intensity.
What is the correct distance and setting for seedlings using the Mars Hydro FC 3000?
Setup. Lighting
4y ago
5
4
Solved
marzadz
Light too far ?
Hi everyone ! I’ve germinated seeds w paper towel method and they been in soil for around 30 hours now, haven’t sprouted yet. I’m worried my light could be a little too far. I have MarsHydro TS600W and it’s at around 40/50 cm from pot rn.
Setup. Lighting
5y ago
2
1
Solved
Cc4mo
Lighting
Should I introduce light when I notice the plant or start right away after planting with an 18/6 light cycle?
Setup. Lighting
3y ago
4
4
Solved
growbie
Lamp replacing
I replaced my current Viparspectra V300 300W led lamp with a Viparspectra V600 lamp 600W. I immediately replaced the new light with the old one. Do you think that switching from 300 watts to 600 can be dangerous for my girls?The conditions remained the same, the temperature and
Setup. Lighting
5y ago
3
5