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Back to Grow Questions
Optimal Veg Light Spectrum?
BlumenBot
started grow question 6y ago
If you had to pick one light color for veg only, never to be used for flower, what would it be? 4000k, 5000k, 6000k, 6500k?
Solved
Setup. Lighting
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TheUk420Show
answered grow question 6y ago
3200k my personal or 5000k a mixture of both would be Ideal I don't know why you would want to only chose one though. This is all LED based I assume are you counting MH bulbs they can be very good for vegative growth just expensive to run.
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Selected By The Grower
ChitownCannaChica
answered grow question 6y ago
I have a veg only—- 4500k. 4000 would be good! ✌️🏻💚🌿
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Crawlndog
answered grow question 6y ago
Personally, I would use 3100K-4000K for Veg... would never go below 3000k
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Similar Grow Questions
Solved
Lillau
Réglage et distance de ma lumière en floraison
How many umols/m2 minimum and maximum For a flowering phase? And growth? At least this way I'll have it I’ll need to bring him in too (photo3)
… Show more
Setup. Lighting
6y ago
2
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Solved
Marcos8matos
Window light is enough?
If I have a window with a good amount of light entering everyday is it sufficient for the plants?
Setup. Lighting
5y ago
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Macx39
Starter kits!
What can I expect from a 600w starter led, I know they're not meant to be great, but of 2 plants in 1.2 x 1.2 x 2m tent, fan kit, filter, etc. I know it won't great an there loads of other factors but say its a good grow, goes well what can you expect with these of good plant.
Setup. Lighting
4y ago
4
7
Solved
arkhive
LED's wont shut completely off
Lights seem to go on a "standby mode" instead of being all the way shut when timers switch them off. Should I buy some other timers? These were brand new, cheap ones though and both the same. Lights are HLG 600 RSPEC and both did this.
Week 4
Setup. Lighting
6y ago
1
2
Solved
MrIssa3x3
Do you lower light intensity and temps towards the end of flower?
So I’m in mid flower, start of week 7 to be exact. I’m curious on when you guys start pulling back light intensity and going with a little cooler temps. I’m running a 240W S33 from AC infinity in a 3x3. Should I be going strictly off of PAR or VPD at this point.
Setup. Lighting
2y ago
1
3
Solved
BullWeedDog
Cuando y como pasar mis plantas a floración??
I'm going to switch my plants to flowering 12/12, I've read that they leave them without light for 48 hours to force flowering, is this good or should I just skip it?? And I have a dimmable ballast, I have it set to 400w, when I switch to 12/12 should I set it to 600w or wait until the second week of flowering to change it to 600w??
Other. General questions
Plant. Other
Setup. Lighting
4y ago
2
2
Solved
Gazeye
Do I keep dimming my light to try to get proper DLI?
Currently at 22" above soil at 50% intensity and still getting ~50DLI at Germ/Seedling stage (too high?). It's a 240W LED. Do I keep dimming the light or do I change light schedule (24h currently) to get proper DLI?
Setup. Lighting
3y ago
2
1
Solved
yomi23
Spider Farmer sp 1000 just arrived and since it has a dimmer knob i was wondering at what percentage should i set it. My seedlings are in week 5, 33 days old now.
Week 5
Setup. Lighting
6y ago
2
2
Solved
Alabham
Is 500 ppfd on new seedlings ok?
My light dimmer only lowers to 500 ppfd. I’m starting autoflower seedlings in a space tote before I move them into my perpetual harvest tent. I’m currently propping the light on its side so that the indirect light only hits around 300-400, as an attempt to reduce light bleaching.
Setup. Lighting
5y ago
2
2
Solved
Not_a_tutorial1990
Lights went off and then on in flower [3rd week]
quick question, my breaker overloaded today and turned off power to my flowering tent. They were about 30 min away from lights out which I figure shouldn't be that bad, but while solving the power issue the lights came back on. Will they be affected and how? Thanks in advance
Week 6
Setup. Lighting
4y ago
2
2
Solved
Screwie
What light should I get for 60x60
I want to get a different light which would be better than. I have Mars Hydro 300W (Classic). I'm thinking of getting Mars Hydro TS1000 which is 138 euro. My grow space is 60x60. Any other suggestions for around the same kind of budget? Thanks.
Setup. Lighting
5y ago
2
3
Solved
girlwhogrows
MarsHydro FCE4800 for a 4x4 grow?
Is the MARS HYDRO FC-E4800 480w the best option to use for my 4x4 tent. Will be doing 9 CBD auto flowers as a hobby. Would you suggest any alternatives? Really appreciate all the advice and will be making my purchase with the advice you have all given me so far!
Setup. Lighting
2y ago
1
5
Solved
tegrityfarms413
light leaks from power strip, ac unit, security cams
can the light from the power strip cause hermie? what about IR from security cams?
Week 2
Setup. Lighting
6y ago
2
2
Solved
JTrim
Is closer to the light much better?
Is the light closer better? I have a VIPARSPECTRA 1000W LED Grow Light (10W LED ,x100) and it says during veg 18-26 and flowering distance at 18-24”. Looking at other growers using LED they are closer. Should I try to keep it closer a little at a time? Is there benefit?
Setup. Lighting
6y ago
1
1
Solved
Waxyne
1rst week flowering
Hi guys ! My girls are starting there first week of flo, and unfortunately my led panel that I order for the bloom hasn't arrived yet... Can they stay under a cold light for a little more ? Is it gonna affect them ?
Week 6
Setup. Lighting
6y ago
4
3
Solved
GermanGrows
Panels vs beams
Why is the flowering footprint on a spider farmer sf-4000 5x5 but the Mars fc-4800 is only 3x3 flower with more watts?
Setup. Lighting
5y ago
1
5
Solved
Growladyeastmidlands
What light is best
Will a maxibright daylight 200w led be good enough for flowering or would you swap to hps for flowering I have lots different leds and hps lights so no cost for me just want the best option
Setup. Lighting
5y ago
1
5
Solved
Mosquito_Haarlem
Daylight or LED?
Next week will be cloudy. Should I put her under a 600w led or is daylight better for her?
Week 3
Setup. Lighting
6y ago
3
2
Solved
Jmaninthemidde420
Light intensity question
Is it safe to increase light intensity? The seedlings are 12 days since popped out of soil and is currently at 50% power on a 500 watt+3% power light
Week 2
Setup. Lighting
4y ago
2
1
Solved
odrex
Should I switch to 12/12 lighting? - Autoflowers not showing pistils after 5 weeks
Growing five plants (germinated Sept 8) including 3 Anvil and 2 BlackStrap autoflower strains from Mandalorian Genetics. The BlackStraps have been showing pistils since about end of week 3. No Anvil plants are showing pistils. Should I switch the lighting schedule to 12/12?
Week 5
Plant. Other
Setup. Lighting
5y ago
3
3