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Back to Grow Questions
Grow light
Spudsfinigin
started grow question 5y ago
When is it best to switch to my big lights
Open
Week 1
Setup. Lighting
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Answer
JuanHaze_Arg
answered grow question 5y ago
It all depends on the size of the plants! Maybe after the 3rd week of veg is when they really start needing more light!
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Complain
MangoDudu
answered grow question 5y ago
When u have filled 3/4 of the orizontal space and not less than half height of the max you have ( thake care of the minimum lamp distance for the height check)
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Complain
Similar Grow Questions
Solved
Cremo
When should I switch on the other half of my LED light setup?
Hi guys, I grow 6 plants in hydroponics in a 4x4 grow box and they are 2-3 weeks old (about 7-8 cm tall). I use MarsHydro TS 3000 LED (450W) which have 2 seperate LED panels. Right now I run only one panel and would like to know when I should turn on the other panel. THX
Setup. Lighting
6y ago
1
2
Solved
Snooziecheesecake
Lighting question
I am running the Viparspectra 450w LED as my light for 4 autos in a 2x4 space. I am worried this isn’t enough, especially because of its lower levels of red. Should I upgrade to something stronger like a Mars hydro 600 or 1000 before flowering start?Or if not Mars something else?
Week 4
Setup. Lighting
6y ago
2
5
Solved
AliceInChainsmoke
Light question
I have a 2x2 36in tall tent w/2 Auto Afghans in preflower. Can someone recommend a cheap but good light, preferably on Amazon? Thx.
Setup. Lighting
6y ago
10
7
Solved
Kershaw1231
Is this OK?
Hi my tent arrived yesterday so I put my 6 auto plants in there my auto nl and 5 other auto seedlings what I need to start diary on them but I run light 18/6 schedule on at 6 am of at 12 am but I've changed today to of at 1pm on at 7 pm is that OK? ?
Setup. Strain - Autoflowering
Setup. Lighting
Setup. Seedling
5y ago
4
Solved
StDeacon
Grow light?
Can one of you please tell me which grow lamp of which is better, I don't have much money at my disposal but would like to work with light. One has uv wavelength and the other does not need uv wavelength?
Setup. Lighting
6y ago
1
2
Solved
Demosthenese
Time lapse under HID lighting
How do people do time lapse with hid lighting? Do I need to set timers to turn off hid, turn on fluorescent and then take the picture? Is there a filter I could buy that eliminates the horizontal scanning lines?
Week 2
Setup. Lighting
5y ago
1
Solved
JoeGrowsGas
ADVICE NEEDED : My grow light has just gone out! And I don’t have a backup while waiting for my replacement what should I do the light has been out for 24 hours, it is not that bad outdoors and quite sunny so I’ve moved them out there. But have now read that it can hurt them!
Week 4
Setup. Lighting
4y ago
4
2
Solved
Finniegrow
When to lower light intensity?
When is the right time to lower light intensity? I'm on 5th week of flowering, should I keep my lights on max or reduce the power/increase the distance to plants? I have around 1000W of Led's at 35-60cm distance from the tops. I see no burning/bleaching or anything like that.
Other. General questions
Setup. Strains - Photoperiod
Setup. Lighting
3y ago
9
7
Solved
bonemealheavenly
light cycle
once a photo period plant starts flowering can i run the lights like an auto 18/6? or does it need to be 12/12
Week 12
Setup. Lighting
6y ago
2
2
Solved
Dillsnills
Veg and bloom switch the rest of the way?
These girls are 12 days old, I'm jus wondering when I should turn both veg and bloom switch on, I'm new so looking for input my last grow I waited till the 4 wk I was going to flip both switches at 2 wks this time, thoughts advice input and or what has worked for others isappreci
Plant. Other
Setup. Strain - Autoflowering
Setup. Lighting
6y ago
2
4
Solved
Plumm
23 hours light per day?
I’m running 4 autos in a 4x4 tent on 20 hours of light per day. I’m thinking about the possibility of changing the light hours to 23 hours a day and 1 dark hour. I’m currently on week 8/9, I’m expecting it to finish roughly 12/14 weeks from birth. Any thoughts on this growers?
Setup. Lighting
6y ago
2
2
Solved
fitinha
Lamp to plant distance: is 40cm enough during flowering phase?
Started with 70cm (afraid to "burn" the leaves), but moved it down to 40cm after checking other grow diaries for auto seeds. Should we keep the lamp ~25-40cm away from the plant from now on? *Lamp is a 300W LED panel (full spectrum)
Week 7
Setup. Lighting
4y ago
3
3
Solved
Grow4Releaf
General question about raising lights.
Gotta question for what most of you are doing to raise your lights? Currently I've just set it static and move as needed. But I'm curious if anyone has a easier method or know of anything made to aid in the raising of the LED light fixtures ?
Setup. Lighting
4y ago
5
5
Solved
Blind_japanese
Distance from bulb or from reflector?
I found content about the distance from grow lights to the plants. I Know that using a 250w MH bulb the distance should be in a range from 20cm to 30cm. But i dont know If I should measure the distance from the glass of the reflector or from the bulb itself to the plants. Help!
Week 3
Setup. Lighting
6y ago
1
2
Solved
Sdubb78
lights on dim cuz of heat
So Ive only got my lights(mars hyd tsw2000) at 50% with dimmer and its almost 29 C during day. Am I worried?
Week 1
Setup. Lighting
5y ago
2
1
Solved
tricombo420
mars hydro vs spider farmer
Hey, which one do you think is better? A Mars Hydro light or Spider Farmer? For example, between these two, which is better for a 120x120x200 tent? Spider Farmer SF2000 LED or MARS HYDRO TSW 2000 LED?
Setup. Lighting
5y ago
8
8
Solved
Dopacks
2x viperspectra xs 1500 150watt ? Does the power of 2 lamps add up together?
Does it make sense to buy another Viperspectra xs1500 with 150watts? So my question is, if the power of 2 same led lamps add up together?
Setup. Lighting
5y ago
1
Solved
Roxie_xx
When do you switch light from veg to bloom with autos?
At what stage would you recommend to switch from the veg lighting setting to bloom for autos
Setup. Lighting
6y ago
1
4
Solved
NorthernStar20
Switching to bloom nutes and photoperiod changes?
When should I start giving bloom nutrients and stopping the veg nutrients? Also can I switch my light cycle to 24hrs to increase the temps and maximise my yield? Or will this mess with the plants?
Week 4
Setup. Lighting
Feeding. Schedule
6y ago
4
3
Solved
popcornsutton
PAR 300 for seedlings?
par at 300 for seedlings but still leggy WTAF
Setup. Lighting
2y ago
3