1000w HPS distance from tops

OldMedUser

Well-Known Member
I just fired up my 1000 and plan to keep it about a foot away but I'm using a light mover so it can be that close. Have it further back for now so the plants can get used to it. Whole lot of fresh seedlings just on their second day under the light so they are even further away.

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Son of a collier

Well-Known Member
from my humble experience i would say that the emphasis from many seems to be getting as close as possible to your plants, however from simple observation you will notice that the buds forming a little further down from the canopy produce trichomes in abundance from early in bloom right up to cropping.
i have a 1000w hps in a 1.2 x 2.4 tent and if i want reasonably even direct coverage i find that once stretch has slowed a good 60cm or 24 inches in old money.
don't grow massively big buds with all the trichomes deteriorated from heat be happy with just big buds with all the taste and kick left in play
 

wearealldumb

Active Member
I Place my 1000s about 16-20 inches. If i wanna stretch em a bit ill raise it up. Im doing a scrog so i dont worry about the lower buds getting a ton of light. Use the light line thats created by the hps on your walls to guide you. If your plants have shaded areas try raising it up a bit. I dont try to place it too close unless i got a mover tho. Heat is the concern when u put them too close you end up cooking the plant.
 

kingtitan

Well-Known Member
I just fired up my 1000 and plan to keep it about a foot away but I'm using a light mover so it can be that close. Have it further back for now so the plants can get used to it. Whole lot of fresh seedlings just on their second day under the light so they are even further away.

View attachment 3908584
Hey. I am using a used light mover I picked up. I have been running about 11-14 inches from the tops but I have run out of headroom week 4 12/12 due to first time rdwc, first time strains and extended veg. I have moved the light to the max height and there is about 14-15 inches right now. Wondering how your 1kw did with running at 12"? Reason is that I could take apart and rig up something to bring it up another 5" but if I would be ok with buds not bleaching if they stretch any further?
 

Tomzy17

Well-Known Member
Hold your hand at the top of the plant for 10-15seconds if it burns your hand or is uncomfortable then it’s the same for your plants.
 

Tomzy17

Well-Known Member
Temps are fine, I am wondering more about the bleaching lol.
That’s what I’m saying if they’re to close you’ll know by how it feels on your skin, and if they’re to close it will bleach them where as if if doesn’t feel uncomfortable it won’t....
 

OldMedUser

Well-Known Member
Hey. I am using a used light mover I picked up. I have been running about 11-14 inches from the tops but I have run out of headroom week 4 12/12 due to first time rdwc, first time strains and extended veg. I have moved the light to the max height and there is about 14-15 inches right now. Wondering how your 1kw did with running at 12"? Reason is that I could take apart and rig up something to bring it up another 5" but if I would be ok with buds not bleaching if they stretch any further?
At the first sign of bleaching then you should do something. Run the mover at top speed and have no pause at the ends so it's not in one place for more than a second or two.

If you have some tops that are taller either bend them out of the way or roll the stem a few inches down until it gets soft and the tops flop over. They'll grow fine.

Computer died over a week ago and I just got back online.

:peace:
 

charface

Well-Known Member
Im currently about 12in w a light mover. Checked my temps on the leaf i think they hit 80 for a few seconds then rapidly cool when the light moves.

If you experience bleaching than raise it. Im not though
 

Evil-Mobo

Well-Known Member
How far should my 1k aircooled hps should be from the top of a 5x5 canopy?
These guys got you covered man just test with your hands. If you're not doing a scrog hang it up and let the girls grow .

Here's a shot of one of my girls with my 600 use to get the same with my 1K's.....

When the big lights are A/C you can get close. If there's no bleaching then leave it be .........

IMG_20180408_212545534_HDR.jpg
 

SPLFreak808

Well-Known Member
With a sun system hood in a 4x5, most strains did well at 18-22", i could get some closer (dj's bd/green crack/dutch treat)

but for the most part, 18-22" kept everything safe in my environment.
 

Buddernugs

Well-Known Member
Same I have a xxxl magnum old school 8” 1000w and believe it or not I can hang hps lower than my mh....right now I’m at 10” from tops in 4x8 tent I plan on lowering it little by little to force lowers to grow
 

Star Dog

Well-Known Member
Same I have a xxxl magnum old school 8” 1000w and believe it or not I can hang hps lower than my mh....right now I’m at 10” from tops in 4x8 tent I plan on lowering it little by little to force lowers to grow
Is your bulb horizontal or vertical?
 

Star Dog

Well-Known Member
I've got a horizontal de parabolic and a vertical parabolic reflector, the vertical orientation can get significantly closer than horizontal, vertical throws the heat out like a doughnut around the bulb, a horizontal also throws it out but in the direction of the plants, idk exactly what height atm I'd say 12/14" burning at 660w.
The vertical parabolic is the best reflector I've ever owned for heat and yeilds.
 
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