The Grow Awards 2026 🏆 
Please read if you can help about Light spectrum for flowering
SBCannabisCostarted grow question 5y ago
Starting week 4 Flower, I have my light (Viparspectra Par600t) 70% blue 90% red they recommend 100/100 for flowering. What u guys think? I kinda don’t wanna blast it with blue because Viparspectra are already high on the blue spectrum.
Open
Setup. Lighting
likes
Answer
BraveheartGeneticsanswered grow question 5y ago
Hi mate,hit her with both as you're trying to simulate the sun.
likes
Complain
Similar Grow Questions
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
LostInTransit23
Should I put the light on before sprouting or not?I'm most likely going to be transferring my autos from paper towel into my medium, I've heard some people say have the light on before they sprout and some who say after it's sprout, which is the best thing to do?Plant. Other
Setup. Lighting
Setup. Seedling
6y ago
2
2
Solved
Tikihoofd
Future - upgradesI might have a silly question, but here goes:
I've found some lights I have left in my garage, and since I would like to upgrade my setup, I would like to know if these lights could function as grow lights.
The light=> Osram Highbay HQL LED E40 140W
Thanks!👽Week 7
Setup. Lighting
6y ago
3
3
Solved
HAPPYCHEFF
Vegetative growth poor sunlightHey time grower here. started growing some seeds i found in some weed i had, plants already on soil on the first stage of vegetative growth but on my backyard i only have 8-9 hours of direct sunlight, will this work for a good vegeative growth? i know they need 18h at least :cSetup. Lighting
1y ago
2
2
Solved
c2_farms
hps to led switch in mid floweringhi... is it ok to put a plant under migro 100 (led cob) that was in a crowded 600 hps tent? the small autoflower is struggling alongside other big boys in a 120x120 tent and i have a 60x60 that has migro in it?! its on day 50
i want gladly like to hear it from people that did it.Week 5
Setup. Lighting
5y ago
1
1
Solved
chronicon
using both veg and bloom switch toggeled to on with led light during flower questioni was watching a video on youtube and the person was using an led light which had separate toggle switches for bloom and veg and during flowering of autoflowers he had both switches on and was wondering if that is better to have both on and if so is it only good for autoflowers?Setup. Strain - Autoflowering
Setup. Lighting
3y ago
6
5
Solved
Sandero
Please Help! Seedlings are cupping and twisting!All my seedings, that are different strains, are tacoing and twisting!! Im starting my seedlings indoors under HLG 65 at 18 in. 78 degrees, 50% RH. I do not understand why they are all doing this (except my white widow) Do i need to move my light further away?Leaves. Curl up
Leaves. Twisted
Setup. Lighting
5y ago
3
6
Solved
aRecreationalist
Grow lightsI'm currently looking for a new grow light. But it's crazy how many choices there are. Since my grow area is very small, 40x40cm or 1x1', I don't need a lot of wattage.
So would prefer to invest in quality over quantity. Any suggestions?Week 11
Setup. Lighting
6y ago
1
1
Solved
Stomvi420
DIY Light Solution For LockdownIve begun my first grow using sunlight as its good weather in the uk
If and when the weather does change I feel like I need to have a light solution ready!
I have around 15m of RGB LED strip and access to most standard light bulbs.
Do they have any chance?
Sorry if stupid questioSetup. Lighting
6y ago
3
3
Solved
Mr_Motalovah
NEED SOME ADVICE! Change to LED from HPS? which ones are good for tent size? Which ones are good for good yields?I've got a 4x4 tent with 8 seedlings in cups but will be in 11L pots.
Currently I had a 600w HPS light but my ballast busted today.
I have a back up CFL 150W not to mess up the light schedule.
Thinking about changing to LED lights, I know it'll be cheaper but I want same yield...Setup. Lighting
6y ago
7
6
Solved
SaltCity
Does my LED need more red spectrum for flowerin?I have an HLG 100v2 LED grow light at 4000K. They say 3000K is better for flowering. Does it make any sense for me to add some cheap red LED strips to add red spectrum? I’d rather not buy another more expensive light if I can just supplement this one. See picture.Week 8
Setup. Lighting
4y ago
1
3
Solved
IniquityX12
Light intensityI'm at the start of week 3, should I crank my light up to 100% or give it another week?Week 2
Setup. Lighting
3y ago
5
3
Solved
Toastdtoast
Changing light schedule on an auto?My plant sprouted 5 days ago, because of temps last night I left the light on and will for the next few days to maintain temp. Its an autoflower but I like having a dark period for my autos. Will it hurt anything if I go back to 20/4 or should I let it ride?Week 1
Setup. Lighting
4y ago
5
2
