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Back to Grow Questions
LED light distance during germination and throughout.
iLuvBlaznMJ
started grow question 5y 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 5y ago
Start at 36"inches and work your way to 18" as the plant grows.
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
amir930
Growing lamp
Im currently using 45W florescent 6500k for the seedling stage. When do you think is the best time to start using the 400W HID with a Cool Tube and how far it should be from the plant?
Week 1
Setup. Lighting
5y ago
1
1
Solved
IndigenousOrganics
Bloom Light Supplement
I am a one plant windowsill grower, but having trouble getting enough light for bloom due to cloudy days. I have a three prong red/Blue LED light off Amazon, Wakyme, that is not cutting it. Would this lamp work? Two bulbs. I will have to suspend it from a clothes rack.
Setup. Lighting
6y ago
1
1
Solved
marzadz
Light too close/too far ?
Is my light too far/ too close ? It’s at 20inches away from a 8 day old plant. I’m using the MarsHydro TS600 W. Thanks ! I don’t want to burn it / for it to stretch too much as I have a 140 cm tall tent. Thanks !! :)
Setup. Lighting
5y ago
2
3
Solved
Ema26
600w hps or LED? Thanks!
Setup. Lighting
6y ago
14
11
Solved
KINGT88
Lighting, to early, flowering, can I stop this or no. New grower
Might be dumb but eh ohwell 1st time grower. Need to know for my next seeds I plant.. So I messed up by putting my plants to early on the 12/12 schedule, now they are starting to flower. Super short! No way I can stop it right? To get more out of my plants?
Buds. Too few
Setup. Lighting
Techniques. 12-12 from seeds
3y ago
6
4
Solved
Thalps
just wondering whether it would be worth increasing the lighting schedule to 18h or 20h. Its currently chilling on a 16h cycle
Week 3
Setup. Lighting
6y ago
2
2
Solved
IQuSX
Extra LED
Good time , Topman! Do you think it is worth installing additional 140W Led? How are you doing ?
Week 11
Setup. Lighting
3y ago
2
4
Solved
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
Ema26
Hey guys I’m wanting to get a mars hydro ts-1000 in UK. Where is the best place to get one online? Or straight from their website personally? Thanks!
Setup. Lighting
6y ago
1
Solved
NewJackWeed
Max 180w LED output for 2x4x6 tent with 3 plants. Good enough?
I have a 3-chip 1000W LED with a max output of 180w (Veg 125w, Bloom 55w): I'm growing autos in a 2x4x6 tent. I'd like to grow 3 plants at a time. Do I need another grow light? Will the one I have suffice?
Setup. Lighting
5y ago
5
4
Solved
Gettingready
24hr of light for autos
Hi all, plants have been on 24hrs for about 3days now. Question is, is it to early for 24hr light cycle?
Week 6
Setup. Lighting
5y ago
4
4
Solved
iwantabike
All day light
Until which week can i have 24 hours of light?
Week 1
Setup. Lighting
5y ago
4
3
Solved
Rangaku
HID to LED mid grow
Has anyone ever moved a plant from HID lights to LED during flower ? Keen to hear from your experience as it’s looking likely that I’ll need to do exactly that in the near future .
Setup. Lighting
3y ago
6
5
Solved
lytesho
Mars Hydro TSW 2000 Height/Dim
For folks with Mars Hydro TSW 2000 experience. What dim did/are you keeping your light on during weeks 2-3? I have done research and looked at MH data, but I would like tried and true experiences. Current dim is set to 2 notches below 50 at 18in. Thanks.
Week 2
Setup. Lighting
4y ago
2
1
Solved
Noahbear
Mars Hydro TSW 2000- Height and Dimmer settings for the various stages
I just bought the MARS HYDRO TSW 2000 Led Grow Light - what should be the distance and dimmer setting on seedlings? Then Veg? Then Flower stage? Any advice would be great? I am currently starting week 2
Setup. Lighting
4y ago
6
5
Solved
Humble_Lion
How to reveg plants after preflowers by the end of april outdoors?
How big are the chances to bounce the plants back to veg after preflowers by the end of april and 14h of day length? Mostly cloudy weather, warm day temperatures (30c) and cooler nights (8c)in the old greenhouse simulated probably to much end of summer vibes.
Week 11
Setup. Strains - Photoperiod
Setup. Lighting
Techniques. Main-lining
3y ago
6
6
Solved
Ghost2022
CR600 1000w
Hi, Can someone please tell me with the cr600 1000w by Fecida how far away they would put the light on a 2 inch seedling of Green Crack and what percentage they would have the power at?
Setup. Lighting
3y ago
2
3
Solved
Vladisrad
Temperature VS More Light which is better for buds size and potency
Should I continue to use two LEDS if temps are reaching 87f during flower (day 1) or just move plants more towards center of tent and use one LED for better temperatures (75f) (only growing two plants). lights are 1000w bestiva and are in a tent that is 24"x48"60".
Buds. Other
Other. General questions
Setup. Lighting
5y ago
3
9
Solved
Blubbiblubb
How to manage a tall plant with a thick stem in week 1 of flowering?
One plant I ordered online was pre-grown. Now, it’s about 20 cm taller than my other plants. At the top, the taller plant gets more than 1000 PPFD, while the lower canopy gets about 500 PPFD. It’s currently week 1 of flowering. The stem is too thick to bend down.What would youdo?
Plant. Too tall
Setup. Lighting
1y ago
5
7
Solved
LordFluffyPants
I have ordered the VipaSpectra Pro 1000W. My tent is I think 3x3 maybe a bit more? I have the 3 girls (4 next grow) Thoughts on using P1000 with the existing ViparSpectra 600W together, for flowering?
Week 7
Setup. Lighting
6y ago
1
3