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Back to Grow Questions
Light hours and luxes?
iwantabike
started grow question 4y 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 4y ago
For seedlings I always do 24h
1 like
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Selected By The Grower
Similar Grow Questions
Solved
Padrino
Lowering light
Should I lower my lights and decrease the intensity to get better penetration or keep them the same height and increase intensity? (These are auto flowers about 50 days old getting towards the end of flower)
Setup. Lighting
2y ago
3
2
Solved
cfc73
change lighting schedule
Im coming to the end of week 3 (runtz auto) lighting 24/0 question?? will it hurt to change to 20/4 shes growing great n looks healthy but im scared of plant exhaustion or do I just keep her at 24/0 any help or tips would be great as this is my 1st grow. thanks
Setup. Lighting
4y ago
2
2
Solved
Growladyeastmidlands
What light should I use please
I have had to scrap all my plants and started again with new seeds autos and I plan to do 10 plants in the tent I have a 600w hps light and also leds 600w and mars hydro 1600w led but with my last grow hermie on me and I don't know why I want to know what light to use now
Setup. Lighting
4y ago
1
3
Solved
Jorath
Wondering if doing another defoliatation would direct more focus to the main sites? Also I have three other plants that are about 2.5 weeks younger, so I have to keep an 18/6 light schedule. Would I have to switch the flowering plant to 12/12 even though it's an auto?
Week 7
Setup. Lighting
5y ago
1
4
Solved
ondrasekcoufal
is this bulb suitable? please tell me if its ok :(
Hi, Im currently growing on a windowsill with natural light only and dont want to buy a light. I found a LED e14 light bulb but i dont know much about it. I wanna use it for vegetative stage only but i dont know if it will work properly and give the plants what they need. Advice?
Setup. Lighting
4y ago
2
2
Solved
79jjsmith
Lighting hight question
I am a new grower thos is a new light i had a cheaper smaller light before i lost the manual from mars looking for the proper hight and power % for each stage thank you in advance
Week 1
Setup. Lighting
5y ago
1
2
Solved
Capo420
Lighting Change
Okay, I feel like I am asking a lot of questions so let me apologize for that. Lol. So my plants just seem to be behind most people's I see on here.Is it too late to change my lighting schedule? My theory was northern hemisphere gets many days 24hr lighting. Good or Bad?
Setup. Lighting
3y ago
1
1
Solved
LeastExpectedGrower
What are optimal PPFD
Anyone have a quick and easy rule/suggestion for PPFD & lux for plants in Seedling, Vegetative & Flowering states? Lots of divergent answers online. At plant top right now I'm currently at ~1000PPFD and the lux readings are 49,000-51,000. What are 'best practices' for this?
Week 3
Setup. Lighting
4y ago
4
3
Solved
guerilla
Darkness before harvest?
So is there really any benefit to give a long period of darkness before harvest? Once again, I'm on the fence with this...
Week 18
Other. Harvest - Drying
Setup. Lighting
3y ago
16
12
Solved
Killab1405
Light distance and intensity
I have a marshydro tsl2000. What distance and intensity should I have for these five darlings? Don't they look wonderful?
Setup. Lighting
4y ago
1
1
Solved
timbarin
How much W is required for automatic plants?
How much W should I use with automatic plants in grow stage?
Week 1
Setup. Lighting
3y ago
2
4
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
2y ago
1
18
Solved
buddhi_coop
Grow lights
Does this look ok? I have 2 plants not growing as fast as my macchiato plant. The other two are different strains, Runtz & Zittles. I don’t want to over do it but I know light is key so I thought I’d ask. Both 1000 watt uv & the other is led. I’m on veg week 5 of all 3.
Week 5
Leaves. Too few
Plant. Too short
Setup. Lighting
4y ago
3
2
Solved
Ksouth1
How to measure lumens of a full spectrum LED light.
Since a lux meter only measures certain spectrums of light, how do I use a lux meter to determine the right height of my full spectrum grow light? I have it at the recommended distance but I have signs of light stress. Bleaching of some upper leaves. I moved it up 4 more inches?
Week 4
Setup. Lighting
5y ago
2
2
Solved
Tubington9
White and blurple led in same tent?
I recently upgraded to a TS1000 for my flower tent, and am waiting on an SF1000D for my veg tent, and now have a tmlapy “1500w” blurple sitting around. Would i gain anything running the blurple and ts1000 in the same tent? Or is it not worth the extra energy consumption
Setup. Lighting
4y ago
1
1
Solved
potfromgreece
Led bulb 54watt in total
Is 6x9w led bulbs(2700k from Leroy Merlin) is enough to grow a plant? 54w in total.
Setup. Lighting
5y ago
4
Solved
FrostyFireFlowers
UV light how to use
Does anyone know if I'm supposed to turn the UV light on by itself for 2 hours a day or is it ok to have it come on while my main LED light is on too? It's the AC Infinity U2 UV Ionbeam they were in stock for 4 days a few weeks ago and I got lucky getting one,ty 4 any help
Week 5
Setup. Lighting
2y ago
4
8
Solved
Kitties_and_Colas
Does anyone else use x2 315watt CMH lights in just a 4x4? Are we overdoing it a little? No bleaching or foxtails and the plants seem happy..curious to hear some opinions. Ty friends!! 🐱
Week 12
Setup. Lighting
4y ago
7
3
Solved
Kershaw1231
Does she need more light ?
Does my plant need more light she is under a 300 watt light I do have a spare do I need to put it to use ? She seems to be growing a Lititle slow for 2nd or 3rd week I am using advanced nutrients grow, micro, bloom any help would be great this is my 1st grow thanks
Other. General questions
Plant. Other
Setup. Lighting
4y ago
1
4
Solved
Dankbudz1
Led
Best budget led uk please
Setup. Lighting
4y ago
1
1