GoldenGanja13
Well-Known Member
Great Link
How close is to close (for the light)?
- Thread starter tfishing
- Start date
aeviaanah
Well-Known Member
ive read through this forum...a couple people are saying there is a point where the light can be too close. the first thread mentioned "assuming heat is not an issue" ive some poeple saying if it doesnt burn your hand its not a problem. i can have my 400 watt light one inch away from my plants and the heat is not an issue. how do you know light is too close if no symptoms are shown? would you just have to grow two seperate plants with two different light distances? last grow i stayed 3 or so inches away. should i be closer to 12 or 18?
High Time 420
Well-Known Member
WOW thats crazy close, why?
You know there such a thing as too much of a good thing is a bad thing. And those leafs are getting too much intense light. Even my HOT5s (Veg Only) I keep 20" away and I get a 1 inch a day of growth, not strech.
Do you say not streched?
I'm not cultivation expert here, but they look streched to me. Yeah, ican see the colars but they look streched too.
What strain, is it 100% sativa?
No offence inteded, Teach me if i'm wrong, i want to learn!
Peace
High Time 420
Well-Known Member
Thank you very much. I was just down there and I here talk of a take overThe flower room is occupied and will not be open until Turkey Day.
OMG, thats the finished product, Amazing!
What strains?
GoldenGanja13
Well-Known Member
These where accidently streched, I was not paying attention. The bottom stems are all taken off and I am getting ready for her to go 12/12.
I wanted some heigth but I sliped and they streched.
GoldenGanja13
Well-Known Member
Thank you... The back two are New York Special (Diesel) clones from avatar. The Avatar yeilded around 7.5oz and the high is energitic and very social, however a few people have forgotten there names after a few bowls.
The front left is NL and she was just flushed a few days before pics. She is really getting sugar coated and swelling like crazy.
The front right is Violater Kush (the 4 veg are cloned from her) Small dense buds that weigh in fat every time. The Stone is powerful and narcotic like, very stinky bud. I carry a small nub in my pocket just to turn heads in the stores, lol.
I am should get a pound off the 4 in veg, if not more.
journey1111
Well-Known Member
My experience with 400w hps cool tube. This was all from light intensity as there is no significant heat.
5" and < bleaches leaves, dehydrates buds.
I agree with the person above me, 9"-13" seems to be ideal.
5" and < bleaches leaves, dehydrates buds.
I agree with the person above me, 9"-13" seems to be ideal.
Daddy Green Genes
Member
T, the plants are getting tons of lumens at the distance they are at. However, a 600W light can generally cover a 5X5 area and your space is smaller than that which means they're getting plenty of light intensity. Usually, the hand under the light at canopy level is the best way to get a feel for the right distance. If your hand is comfortable, the plants are comfortable. Since you have the heat from the light being exhausted you can get it closer to the tops, but too close is not a good thing. Pay attention to the leaves at the canopy. if they are curling up or drying out at all the light is probably too close. With the height you have to work with, I would suggest moving the light up 6 inches or so (between 18" to 24"). Watch the plants closely, but it would be better to keep it at a safe distance than to burn the tips or stress the plant. Also, are you topping the plants soon or doing something to shape the growth? You should totally throw some string across there and SCROG it up when you know which ones your keeping. Good luck
GoldenGanja13
Well-Known Member
Bleached leaves start to turn a softer shade of green, then it gets more yellowish.
GoldenGanja13
Well-Known Member
Ok so I went back to my charts and graphs to see where I let them strech and why, ok here's what happened ~
I read alot about super cropping so I tryed one branch, I did not care for it, so I squished the stem just below the top branches (thumb/forefinger) until I heard "squish" then I stoped. I did nothing else. They stood straight up still (branches) but after one week there growth went up 4-6 inches and you can see a bruise where I squished them and above the bruise the stems got extra fat and below the squish no extra fattness.
SeriousSmoker
Well-Known Member
WOW AM I THE ONLY ONE HERE WHO THINKS YOU SHOULD PUT YOUR 600 WATT A LOT CLOSER THAN 18 INCHES! YOU MUST BE KIDDING ME.
I keep my 600 watts 6-9 inches away as long as the plants are not showing any signs of burn or stress,
AND MY RESULTS FROM DOING THIS ARE 1.4lbs of kush per 600 watt bulb, 6 times a year!
PLEASE PUT YOUR BULBS CLOSER DONT BE SCARED, THE PLANTS NEED THE LIGHT! THE BUDS NEED THE LIGHT! THE AMOUNT OF LIGHT YOU LOSE EVERY INCH YOU GO HIGHER IS ULTIMATELY DEVASTATING TO THE FINAL YIELD! i cant believe so many of you are saying 18 inches for a 600 watt light that is complete LUNACY! Ive seen hands on what poor results bulbs being too high can do to final but production! YEAH THEYRE GREEN AND HEALTHY BUT THE COULDVE BEEN 3x HEAVIER WITH MORE LIGHT! ALL LEAVES SHOULD BE YELLOW BY HARVEST, IMO!
ps for final two weeks i keep all lights atleast two feet away, more proper maturation etc.
smoker out
I keep my 600 watts 6-9 inches away as long as the plants are not showing any signs of burn or stress,
AND MY RESULTS FROM DOING THIS ARE 1.4lbs of kush per 600 watt bulb, 6 times a year!
PLEASE PUT YOUR BULBS CLOSER DONT BE SCARED, THE PLANTS NEED THE LIGHT! THE BUDS NEED THE LIGHT! THE AMOUNT OF LIGHT YOU LOSE EVERY INCH YOU GO HIGHER IS ULTIMATELY DEVASTATING TO THE FINAL YIELD! i cant believe so many of you are saying 18 inches for a 600 watt light that is complete LUNACY! Ive seen hands on what poor results bulbs being too high can do to final but production! YEAH THEYRE GREEN AND HEALTHY BUT THE COULDVE BEEN 3x HEAVIER WITH MORE LIGHT! ALL LEAVES SHOULD BE YELLOW BY HARVEST, IMO!
ps for final two weeks i keep all lights atleast two feet away, more proper maturation etc.
smoker out
Uncle Ben
Well-Known Member
You'll soon find out if you give your plants too much light, go past their light saturation point. You bleach out the chlorophyll and you're in deep doo doo.
One must compare apples to apples - a 600W MH does not have the output of a similiar HPS. And for the record, "back of the hand" drill is lame. It has no value in regards to lumens that a plant receives.
UB
oh really???
Well-Known Member
so then how do you know where to put the light? I have a cool tube plus a fan blowing between the tops and the tube. I can put the bulb 6 inches with no intense heat. It does limit the outer reaches of the light and points the intensity to the middle of the light footprint. I did notice this "bleaching" on one of my plants I think it could also be attributed to a nute deficiency.
Uncle Ben
Well-Known Member
Uncle Ben
Well-Known Member
FYI
Footcandle light values are given for a 250W Phillips HPS and a 600W HPS, both taken from the centerpoint of the bulb/bottom of a white Diamond Lights reflector having a typical gull wing insert.
DISTANCE FROM LIGHT................F.C. READING
....................250W HPS..............600W HPS
Within 6" (Way off 10K f.c. scale for both lamps)
6".......................10,000...............10K+
8".......................7,100.................10K+
12"......................4,800................8,700
18"......................2,800................5,600
24"......................2,000................4,200
30"......................1,400................3,300
Frame of reference: sun = 9,000 - 10,000 f.c. average, clear summer day;
Cool White 4' shop light measured 2" from bulb = 1,200 f.c.
Enjoy,
Uncle Ben
Footcandle light values are given for a 250W Phillips HPS and a 600W HPS, both taken from the centerpoint of the bulb/bottom of a white Diamond Lights reflector having a typical gull wing insert.
DISTANCE FROM LIGHT................F.C. READING
....................250W HPS..............600W HPS
Within 6" (Way off 10K f.c. scale for both lamps)
6".......................10,000...............10K+
8".......................7,100.................10K+
12"......................4,800................8,700
18"......................2,800................5,600
24"......................2,000................4,200
30"......................1,400................3,300
Frame of reference: sun = 9,000 - 10,000 f.c. average, clear summer day;
Cool White 4' shop light measured 2" from bulb = 1,200 f.c.
Enjoy,
Uncle Ben
I agree with the people who've said to back off the distance of the light.
People saying get HIDs as close as possible without causing heat stress make me wonder if they've ever used them before.
I could put plants 3" under my 1000W without getting heat stress, but they'd be the color of piss in a few days.
12-18" for a 600 (be it MH or HPS) is perfectly fine.
People saying get HIDs as close as possible without causing heat stress make me wonder if they've ever used them before.
I could put plants 3" under my 1000W without getting heat stress, but they'd be the color of piss in a few days.
12-18" for a 600 (be it MH or HPS) is perfectly fine.
Uncle Ben
Well-Known Member
Likely not.
All depends on the hood, age of the lamp, etc. You can put a MH closer than a HPS without worrying about bleaching out the chlorophyll.
UB