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Back to Grow Questions
Light distance from canopy
DennM39
started grow question 4y ago
My 4x8 tent has two 2000watt led lights in it .. what’s a good distance to keep my lights above the canopy ?
Solved
Setup. Lighting
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Skinnytalls420
answered grow question 4y ago
Germination: 50~70cm Seedling: 45~60cm Vegetative: 40~50cm Flower: 20~40cm Good luck!!!!
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Selected By The Grower
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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
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Solved
R4inBoW
Lampenabstand
Welchen Abstand würdet ihr zu den Pflanzen zu Beginn empfehlen, die Lampe ist dimmbar. In der ersten Woche mit 25% Lichtintensität starten oder?
Setup. Lighting
4y ago
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izzy89
Mars Hydro FC4800 vs FC-E4800
FC4800 = 2016 samsung diodes| 2,8 µmol/j |1347µmol PPE -- FC-E4800= 2646 bridgelux diodes | 2,7 µmol/j |1328µmol PPE Both are 480watt lights... Is there a difference between µmol 2,7 and 2,8 when it comes to yield? Is the FC4800 worth the extra money? Doesn't cost much more
Setup. Lighting
4y ago
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Fongzy
PPFD Values for HPS LED
Hello my fellow Growmies! Looking for optimal PPFD values in flower from canopy to light for both HPS and LED. Many thanks.
Setup. Lighting
3y ago
1
2
Solved
CreatureCreator
How much light - PPFD - without CO2?
How high in power should I go with my lights without CO2 enrichment? I can comfortably provide 1200 PPFD to the canopy, but I'm holding it down near 900 because I'm not sure the extra power used would yield an increase in, um, yield.
Week 7
Setup. Lighting
4y ago
3
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
4y ago
5
3
Solved
NewJackWeed
Mars Hydro TSL 2000 questions
Other than recommended distance from the manufacture, how do I know how dim/bright the light should be? Also, since these are autos, do I flip at 5 weeks, or just keep going until I’m ready to?
Week 3
Setup. Lighting
5y ago
3
5
Solved
MarkGreenThumb
Old School Outdoor, to New School indoor. =D
Old School outdoor Grower. First time indoor Grow, first time using tents. Any and all advice along this way is welcomed. Some questions I have now are... 1. When should I switch form my CFL lights to my HPS's 2. Should I think about switching from HPS to LED's?
Week 1
Setup. Lighting
5y ago
3
3
Solved
alien_grower
Efficient lighting
Keeping both 200w VEG and 300w FLOWER lights 24h is too expensive for my alien wallet. So I left the veg light under 12h/12h and flower on. Please share with me some of your past experiences and how can I save money and grow killer yields. 👋👽
Week 5
Setup. Lighting
5y ago
4
4
Solved
AliceInChainsmoke
1st Autoflower grow questions
Video is the girls in their small tent with my temporary DIY ventilation till the fan/filter kit arrives this week. Take a look! Thinking of trellis netting with 3inch squares. Need recommendations for grow light for remainder of grow & future grows coming soon for 2x2 tent.
Week 5
Buds. Other
Setup. Lighting
Techniques. ScrOG
5y ago
1
2
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
VulKrif
Seedling growth rate
Plants grow almost 1 cm per day (3rd week). Is it too little or correct? I have the impression that they still lack light (the rods are quite thin and long), maybe I should bring them closer to the LEDs?
Week 2
Plant. Too short
Plant. Too tall
Setup. Lighting
2y ago
3
2
Solved
RichBud5
Help! Timer problem.
My timer on 18-6 broke and i'm not sure if the girls had 24 hours for the past couple days... by putting them back into 18-6 will that trick them into flower? Hope not. Thanks :)
Setup. Lighting
5y ago
3
2
Solved
GACiNATI
Heat / light
Yesterday i added a 3rd light and it made a noticeable difference in just a day but my temp is getting up to 86 and humidity is like 43-50 should i try to keep using the light? My leaves didn't droop and the plant looked the same but the leaves were praying way harder ,no droop ?
Week 8
Setup. Lighting
5y ago
1
1
Solved
Tubington9
Mars Hydro TS1000 and Spider Farmer SF1000D in 26x26 tent together?
I’ve purchased an Mars Hydro FC-E 3000 for my 3x3 tent, so I now have a TS 1000 I’ve removed from the 3x3, that I want to move to my 26x26 and run it along side my Spider Farmer SF1000D. Is that overkill/pointless waste of energy for that size environment?
Setup. Lighting
4y ago
1
1
Solved
CortezKush
Uv lighting
Is it beneficial using uv for veg or just flower? My light has a veg/bloom/uv toggle.
Setup. Lighting
4y ago
3
2
Solved
MrFink
Should I flip?
I’ve got my plants in 2gal fabric pots and I’m not planning on transplanting up. The plants are averaging about 8/9” and I’m starting to see small roots out the bottom. Should I flip to flowering, or can I get away with another week of veg?
Week 5
Setup. Lighting
5y ago
5
3
Solved
2x2growing
Ppfd?
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.
Week 6
Setup. Lighting
5y ago
3
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
m0use
LED Kelvin Temp 3000k-6500k
Is there a massive difference in colour temperature/kelvin of LED's if the lumens, PAR, watts, intensity and every other aspect you can think of is the same but its temp/kelvin is lower? I use a 6500k LEDs, may mix in or switch to 3000K for better flowers if its proven to work.
Week 10
Other. General questions
Other. Other
Setup. Lighting
6y ago
5
3