The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Powerful HPS distance
Sooperdooper
started grow question 5y ago
How far can my 600w HPS light be and still result in good growth?
Solved
Week 11
Setup. Lighting
likes
Athos
answered grow question 5y ago
Without an air cooled hood the light to canopy distance should be between 12 to 18 inches (30 to 45 cm)
1 like
Complain
Selected By The Grower
CloneKingz
answered grow question 5y ago
Heya! a 600W I would say should be no further than 20" away during flower. That would be around 700par according to most 600W HPS manufacturers. Lowest I would go is 12" with gooood ventilation. Cheers,
1 like
Complain
Similar Grow Questions
Solved
Ema26
Anyone have any history with vibrating HPS lamps? Mine keeps making a buzzing/rattling noise. I’m thinking it’s the metal inside rattling on the glass so if I slightly rotate it it may stop? What do you think? Thanks!
Setup. Lighting
6y ago
4
3
Solved
laberg
Grow light question
I notice a decent drop off in PAR as my meter moves away from center. I have a 2x2 tent and am thinking of buying a light for a 3x3 tent that has gaps allowing for ventilation. Any thoughts?
Week 3
Setup. Lighting
3y ago
4
4
Solved
Hansgrube
Can I use regular sunglasses inside my tent?
Can I use regular sunglasses inside the grow tent to keep my eyes?
Other. General questions
Setup. Lighting
Setup. Other
6y ago
5
Solved
NedKelly
Best light for a 2x4 tent
What light would be best for a 2x4 gorilla tent? Technology seems to be changing so fast. I am on my third grow and want to improve. Thanks in advance!
Week 11
Setup. Lighting
5y ago
5
5
Solved
iopiopiop
Lights
I have 3 weeks of flowering left over and Id like your guys opinion. Do I leave my plant under the sun for 8hrs (max direct sunlight time) a day or do I keep it under a 6500k 150w Growlight? (For the whole day)
Week 11
Setup. Lighting
5y ago
1
1
Solved
Tango_Hotel_Charlie
lights
anyone ever combine a 315w cmh and 600w hps in a grow tent?
Setup. Lighting
6y ago
1
5
Solved
Skippie7
Light cycle below 12H
Will giving the plant less than 12 hours of light a day cause any major negative effects in flowering stage?
Week 8
Setup. Lighting
3y ago
8
7
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
3y ago
2
2
Solved
Newbiegrower420
Is it worth adding a LED 18w 2700k strip light for last few weeks of flower?
Should I add this light for the last few weeks of flower? I have a Streetlight 18w LED strip see pics. I was thinking that if I added this strip designed for flower to my tent like a side light it may help my Viparspectra V300 in fattening those buds a little. Thoughts?
Week 12
Setup. Lighting
5y ago
6
4
Solved
a_tribe_thats_stoned
4 by 4 tent wattage
For a 4 by 4 tent with 6 to 8 plants in it what would you recommend for light wattage. I have all LEDs and also is 800 over kill
Setup. Lighting
3y ago
2
3
Solved
Meimei99
light HYDRO FARM and SPIDER FARM where is my best choice for 400$
I want to grow about 10 plants in my house, with an area of 8x3 ft, I like the choice of light HYDRO FARM and SPIDER FARM where is my best choice for 400$ please help me for this it's my first time planting !! Thanks bro!!!
Setup. Lighting
4y ago
3
3
Solved
GreenGuerilla
Will the change from indoors to out trip my plants into flowering?
Hi, Guys, I plan to move my plants outdoors next week. Will the change in the light schedule trip them from veg to flower? I really don't want this. They're currently @ 3 weeks on 18hrs indoors and outdoors they'll be getting 11hrs direct sunlight. Also, they're photo's not autos
Week 3
Setup. Strains - Photoperiod
Setup. Lighting
Setup. Outdoor
6y ago
6
6
Solved
topbilling
Light distance and when to top?
I'm using a 300W LED. What distance should I keep the lights at now that I've transplanted and the plants are doing well? I'm thinking 24" and then move up as they grow until flipping. Also, when should I top? I've read that waiting for 6-8 nodes is the right way to go.
Week 6
Setup. Lighting
Techniques. Topping
6y ago
1
Solved
Hydro_guy
LED light intensity
So can anyone tell me from experience what are good light dimmer settings and height above seedlings for a SpiderFarmer SF7000? And for the other stages of life would be great. First time using LED's and don't want to fry my babies, I used to use MH and HPS lights.
Week 1
Setup. Lighting
4y ago
6
4
Solved
PREPPYPUNK
need a maxsisun plug.
maxsisun sent me a new light but it didnt come with the power cable. Anyone know how to get ahold of MAXSISUN , directly without going through amazon or a way to buy one? Thanks!!! its the cable that plugs into the one in pic.
Other. Other
Setup. Lighting
5y ago
1
4
Solved
aRecreationalist
Grow lights
I'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
Marlboro
Колличество света
Подскажите., почему во всех гайдах и пособиях пищут что автоцветам нужно на цветении 500mmol/cm2 а фотопиродным 700, в то время как реально под солнечным светом растение в ауте получает 1400-1600. Почему не дать столько же света растениям в индоре?
Week 9
Setup. Lighting
3y ago
1
2
Solved
TrimQueen
120w enough to make a single trained plant bloom well?
Guys, I have 120w LED white spectrum. Is it enough power to bloom this beauty? Thank you all
Setup. Lighting
5y ago
2
1
Solved
Skyhi
Light distance and intensity.
What is the correct distance and setting for seedlings using the Mars Hydro FC 3000?
Setup. Lighting
4y ago
5
4
Solved
TonkaSun
raise lights during stretch?
Should I raise the lights during flower stretch to maintain the same distance from light source to canopy? I notice that my plants continue to get taller than most. I know the stretch is natural, but I'm wondering if constantly raising the lights with growth is the right approach
Week 12
Setup. Lighting
3y ago
2
1