Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
How much W is required for automatic plants?
timbarin
started grow question 4y ago
How much W should I use with automatic plants in grow stage?
Solved
Week 1
Setup. Lighting
likes
DrJones
answered grow question 4y ago
100W / 150W for a 2X2ft 300W for a 3X3ft
1 like
Complain
Selected By The Grower
Chow_13
answered grow question 4y ago
The same amount of W that you used for the other 10 auto grows you did. Happy Growing
likes
Complain
crimsonecho
answered grow question 4y ago
you can never have enough W i guess lol
1 like
Complain
GrowCN
answered grow question 4y ago
What is "W"? worms?
likes
Complain
Similar Grow Questions
Solved
Autogrowz
Light distance for seedlings
I have a 300W Mars Hydro light LED. My plant just crawled out of the dirt a few hours ago? Is 23 inches a good distance away for the light? Thanks!
Setup. Lighting
6y ago
2
2
Solved
Rooflower
Whats going on with my Grow lights ?
Hey there , I was looking at that picture and noticed a difference brightness of those lights and the red color differ At least at the camera lens ! They supposed to be the same wattage 🤔 So I was wondering , is that the reason why BananaOG is a bit smaller and underdeveloped 🤓
Week 9
Setup. Lighting
5y ago
3
Solved
Kayaboy
Downgrade my light wattage or not?
My tent is 80cm x 80cm x 180cm and i use a 400w hps/mh. Based on all light calculations i came across it gives me a total requirements of light of around 160-200 watts. Should i downgrade to a 250w system or keep the 400w and why please, some expert ? Thx
Setup. Lighting
6y ago
2
2
Solved
DrFabrizio_85
Dim my lights
Starting 4th week of flower. Can i dim my light from 460 to 350 watts? Would it be a problem? I wanna dim because my temp is too high.
Setup. Lighting
6y ago
1
Solved
LordFluffyPants
OK, my grow tent is 4ftx4ftx7ft. I have been veg with 600W ViparSpectra. I have now go t my new P1000 ViparSpectra 1000W. With both running, and 3 plants, growing in soil, what sort of yield can I expect? The YOR calculator is only setup for HPS/MH.
Week 7
Setup. Lighting
6y ago
2
2
Solved
QuiGonJib
Almost done
This is our first grow and we are in week 6 of bloom. Does anyone have an idea for the brother in the picture. He grew above the lights. We not sure how to handle it. Two leaves are to close to the light and turned yellow. Should we cut them away or leave them on it
Leaves. Color - Yellow
Setup. Lighting
5y ago
1
2
Solved
420Highlifecouple
How many hours during bud.
Hey guys,anyone experience any differance with the following flower light schedule for AUTOFLOWERS. 12/12, 13/11, 14/10.Should I stick to generic 12/12?
Setup. Strain - Autoflowering
Setup. Lighting
Techniques. 12-12 from seeds
5y ago
2
9
Solved
Faegrows
Affordable but good growlight for small space
I'm looking for a cheap light to grow one plant, the current one (90w) have just doesn't have enough juice so I'd like to upgrade. I know mars has some good and affordable lights. Any other brands or not so famous brands in Europe that are cheap but good? Tips are welcome!
Setup. Lighting
5y ago
3
4
Solved
TheObserver
Wrong power cable in my LED light: still light when switched down off.
Have you ever made this mistake? My second harvest was someway worst then my first. Sure I did some watering mistakes but during my chores in the room and in the tent, I found out. I used a random power cable on my PAR LED lamp so when It turned off still had some light on. Bang!
Week 16
Setup. Lighting
1y ago
5
7
Solved
HappySkunk
Viparspectra LED tips
I’m looking into buying a viparspectra in the future. Which one is best for one plant? I’ve been looking at the 600W one, but I don’t know if that’s the best option for growing a good yield plant in a 80x80x160cm tent.
Setup. Lighting
6y ago
2
2
Solved
Pupper
What’s the ideal amount of LED light for top quality in a 4x4 tent.
I’m exclusively looking to grow top end quality. Already can with HPS setup but wanting to switch. Is 480w Kingbrite LED quantum board with 385,660,730nm enough for this or do I need more? Any other suggestions? Aliexpress/Alibaba manufacturers preferred due to shipping costs.
Setup. Lighting
5y ago
4
4
Solved
Dylan88
Indoor/outdoor grow aus
Is 4x450 watt LED viperspectra’s enough for a 9x4 tent?
Setup. Lighting
3y ago
3
Solved
Kolibri
Marshydro FC oder FC-E
Lohnt sich der Mehrpreis der FC Serie im Vergleich zur FC-E Serie? Auf dem Papier ist der Unterschied ja eher marginal.
Setup. Lighting
4y ago
1
2
Solved
AhHeeeeeeee
Growing with 12v?
What if I took my plants on a jaunt, say a week, in a small (vwt4) camper? Is there such thing as a 12v light that’s suitable?
Setup. Lighting
4y ago
3
4
Solved
ngenius
hey guys , a have a question regarding light. So, I have 2 autoflowers under a 130w led right now both age 14days exactly. In a couple days a will also have the mars hydro ts600. I am working with a 1meter squared tent. how high sould i hang my lights during veg and flower ?
Setup. Lighting
5y ago
2
4
Solved
haze_gino
LED distance meizhi 120 watt
hi guys, my question is… how much distant i should use my meizhi LED 120watt ( real watt ) from my plant? currently i using it at 50cm distance from the plant.
Setup. Lighting
Setup. Other
5y ago
3
3
Solved
bigdaddyjay73
Going from flou
I have my seedlings under a 4-bulb 6500k fluorescent light fixture at an 18/6 light schedule. When would be a good time to introduce the plants to my Black Dog Phytomax 1000W lamp?
Week 3
Setup. Lighting
6y ago
2
2
Solved
arg_weedlover
Light intensity in veg - Help needed!
I have a 4x4 Tent (120x120cm) with 16 Autos and run a 480W 3.5K LED at ~55 % at a dist. of 40-48 cm (1.3-1.5 feet). Lux: 20-26k. They are tall with up to 14 cm (0.45 feet). What would be the right light density in week 2-3? Ideas? Plz help! THX
Setup. Lighting
5y ago
4
5
Solved
noobiii
How many watts do I need for my small tent?
I am using a full spectrum LED that draws only 30W from the wall but it might be too weak since my plant is getting lanky. I have moved it closer to the plant but now I am afraid of over-heating. How many watts LED would be sufficient for my 40cmX40cmx120cm tent?
Plant. Too tall
Plant. Stem - Weak
Setup. Lighting
5y ago
2
2
Solved
Gianemba
Copy the lamp
Can i use a mirror to double up the light? Maybe with an angle like / I mean it's like the next dimension
Setup. Lighting
6y ago
2
1