Vote Now 🏆 for the Grow Awards 2025!
Start My Diary
Login
Sign Up
Login
Home
Diaries
Shorts
Questions
Contests
Growers
Strains
Breeders
Nutrients
Lights
Equipment
Blog
English
Espanól
Русский
Deutsch
ไทย
Login
Start My Diary
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Chat
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy. For details please see
Privacy Policy
Accept
Grow Questions
PPFD Values for HPS LED
PPFD Values for HPS LED
Fongzy
started grow question 2 years ago
Hello my fellow Growmies! Looking for optimal PPFD values in flower from canopy to light for both HPS and LED. Many thanks.
Solved
Setup. Lighting
like
GrowCN
answered grow question 2 years ago
Search online for Daily Light Integral (DLI) chart. The chart shows PPFD and hours per day. Then you can pick the light level based on how many hours you run the light.
1 like
Complain
Selected By The Grower
Fongzy
answered grow question 2 years ago
I am unable to edit. LUX values would be preferred.
like
Complain
Similar Grow Questions
Solved
NewJackWeed
Seeking a reasonably priced light for 2x4x6 tent (still)
I'm interested in picking this up. Thoughts? I have a 2x4x6 tent. I believe it's 50w x 8sqft is 400 watts needed? https://www.amazon.com/iPower-Digital-Dimmable-System-Reflector/dp/B006GGP8P4/ref=sr_1_2?_encoding=UTF8&c=ts&dchild=1&keywords=Plant+Growing+Light+Fixtures&qid=16110
Week 4
Setup. Strain - Autoflowering
Setup. Lighting
4 years ago
6
4
Solved
PREPPYPUNK
MARZ HYDRO TSW 2000 or MAXSISUN MF 2000 WITH DIMMER, MEANWELL DRIVER AND THE SAMSUNG LEDS ? please help!
PLEASE HELP try to keep very simple. which light would use on a 3x3 tent with 6, 3 inch seedlings in 3gallon pots of foxfarm? MAXSISUN MF 2000 WITH DIMMER, MEANWELL DRIVER AND THE SAMSUNG LEDS OR THE MARZ HYDRO TSW 2000? Thank you in advance!! really freaking out
Setup. Lighting
4 years ago
2
2
Solved
Wilsongrowwell
Have I got enough light in my tent ??
I’m growing 2 silver haze from seed in the autopot set up, however I only plan to use 1 optic 1xl cob light. My question is do you think this will be enough light or will I need to introduce another light ? Thanks in advance !
Setup. Lighting
4 years ago
1
1
Solved
Sillystoat
Lighting schedule?
Many references state the when moving from vegetative to flowering stage the lighting schedule (indoors) needs to be reduced from 18-20 hours down to no more than 12. Why do many here stay at 18 or more the whole way through?
Setup. Lighting
4 years ago
1
3
Solved
MarkGreenThumb
Old School Outdoor, to New School indoor. =D
Old School outdoor Grower. First time indoor Grow, first time using tents. Any and all advice along this way is welcomed. Some questions I have now are... 1. When should I switch form my CFL lights to my HPS's 2. Should I think about switching from HPS to LED's?
Week 1
Setup. Lighting
4 years ago
3
3
Solved
PeppeItalia
Luce rossa e blu insieme in vegetativa.
Secondo voi accendere led vegetativi luce blu, insieme alla luce rossa può fare male ai piantini. Oppure tenere tutte e due pulsanti della lampada accesi insieme non farà solo che bene alle piantine?
Week 1
Setup. Lighting
4 years ago
1
2
Solved
Lumberdog
Lights for heat- 24/7 okay?
I really need the heat of the lights to keep the inside of my tent warm. To warm the air around the tent 24/7 would be expensive- much more expensive than using the lights all the time. But will this work with 24 hour lights? Will that stress the plants? Using auto flowers.
Week 1
Setup. Lighting
4 years ago
2
1
Solved
SWUKGrower
Will a 1000w LED be enough for flowering?
Im about to start my 3rd ever grow, now I cant get enough of it. For my last 2 grows, in a 90x90x200 tent, I've has a MARS Hydro TS 1000w LED for Veg / 600w HPS for Flowering.... Can I use only the LED throughout? The heat from the HPS is crazy. Cant wait to start posting on here
Setup. Lighting
4 years ago
5
5
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
4 years ago
1
2
Solved
GrowwUp
When turn on the lights?
It's pretty warm here right now already. When is the right moment to turn the light on? It's a dual spectrum 300w CFL under a 470x470 reflector and both seedlings are auto fem. What's the best light schedule? 24/0? 18/6? Thanks
Setup. Lighting
4 years ago
2
2
Solved
Bingo86
Light height and brightness
Can anyone please suggest a good height/distance I should have my light at this stage please and what percentage I should have the light dimmer on? Thank you
Week 1
Setup. Lighting
4 years ago
3
3
Solved
AlpineGoat
Low budget light
I don't know if this is the right light. I'm gonna leave it for a week but if I don't see any kind of growth I'm gonna replace it with some good light. But since it's a wooden box I don't want to put a big light, maybe some stripe or bars, any low-budget suggestion is appreciated
Week 2
Setup. Lighting
4 years ago
4
6
Solved
MarkGreenThumb
Bulb Distance from my Little babies. =D
Little girls are looking a lot taller today. Will post a new week in 3 days. But as they are growing so fast and I'm still using 125 CFL, How much distance between bulb/reflector and plants should I keep.?? I will be switching to a HPS at some stage,
Week 1
Setup. Lighting
4 years ago
1
1
Solved
hirund
Should I switch to flowering now?
The height of my growbox is 120cm (4 feet) and I'm afraid that sativa can grow taller than that.
Week 2
Setup. Lighting
4 years ago
3
3
Solved
NewJackWeed
Mars Hydro TSL 2000 questions
Other than recommended distance from the manufacture, how do I know how dim/bright the light should be? Also, since these are autos, do I flip at 5 weeks, or just keep going until I’m ready to?
Week 3
Setup. Lighting
4 years ago
3
5
Solved
NewJackWeed
Mars Hydro dim settings
@weezy90 I have it dimmed to about 35% at 19”. I may be paranoid but I think I see slight tacoing! Should I crank to 90%? 100%?
Week 3
Leaves. Curl up
Setup. Lighting
4 years ago
3
4
Solved
AUTOASSASSIN215
New 4x4x8 Tent Need a better light 400 budget any suggestions??
I have a new 4x4x8 grow tent growing about 4 to 5 plants so now i have to upgrade the light i’m on a budget about 400 dollars Any suggestions or strategy
Setup. Lighting
4 years ago
12
14
Solved
Michael1234
height of the TSW 2000 led lamp from the gables
Hello, my plants have started producing flowers, I would like to ask for advice on the height of my TSW2000 led lamp from the tops
Week 7
Setup. Lighting
4 years ago
1
1
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
4 years ago
1
4
Solved
PREPPYPUNK
LOWERED LIGHTS TO 9 INCHES FROM TOP FROM MFGRS SUGGESTED 18 INCHES FOR LAST FEW WEEKS OF FLOWER, FANS BLOWING ON TOPS AND TEMP IS FINE FOR PAST WEEK. CAN THIS HELP BUD GROWTH? THANK YOU!!!
Week 9
Setup. Lighting
4 years ago
3
2