1000w HPS 20" away - still have light burn

[Track]

So, my 1000w HPS bulb is currently 20" from the nearest plant and its top leaves are curling up and there is light burn in various places.

I was going to put it up higher, but then I saw that the lumen output becomes significantly lower the further away from the plants the light is.

What does it mean and what do I do?

 

[Rosebud]

Move your light up til you can leave your hand comfortable under the light for a few minutes. If it is hot on your hand it is too hot for the plants.

Move your light.

 

[orangesunshine]

20" seems a bit far away to be light burn, but if you are certain that is what it is---then move it away some more

curling and burning leaves may be signs of other things going on---if you spot up with some pics---you will likely get some more accurate advice

 

[The Hemp Goddess]

I am with orange--it sounds too far away to have light burn. I have mine at 12" away now without glass and without burn. What are the temps in your tent? Could you post up a picture? Can you give us a rundown on your space? Ventilation? Size, Etc. I am thinking that you have some other issue rather than the light being too close.

 

[Track]

Actually, now that I think of it, I think the culprit might be the temps. They're in the 29-31C range when the lights are on. Too hot, right?

Btw, @The Hemp Goddess: I never understood the quote in your sig. Well behaved men rarely make history, as well.

 

[akhockey]

If you are using additives, this could make your plants more light sensitive. Ive run the same strain under 1000w in hydro for 2 years and the only time I had light burn was when I tried using Koolbloom powder. I tried it twice. Once with summer temps, and once with winter temps. My room never gets above 85 F in summer or 70 F in winter but both times they crisped up. It was definitely light burn and not nute burn.

 

[skullcandy]

i have not used a light likethat but have read that a cool tubefor the light helps with that problem.

that or you got sometype of nute burn..

 

[7greeneyes]

Are you misting them or spilling water that you didn't really think about till now?

 

[The Hemp Goddess]

Actually, now that I think of it, I think the culprit might be the temps. They're in the 29-31C range when the lights are on. Too hot, right?

Btw, @The Hemp Goddess: I never understood the quote in your sig. Well behaved men rarely make history, as well.

The author of this was born in 1938, a time when women had little rights. She is a historian of early America and the history of women and a university professor at Harvard University. This the title of a book and is about important women in history and the ruckus they had to raise--people like Rosa Parks.

The way I take the quote is that women have HAD TO raise a little hell to be "heard"--if all women remained quiet and prim and proper, we may still not be able to vote. I have had an interesting life in that I have had a lot of "guy jobs". I have had to fight and kick to get the things I did. I found that I had to work harder and know more than the men who did the same job just because I was a woman. I have been turned down for jobs or not promoted because I was a woman. Things are far better, but we really are still a ways away from true sexual equality.

PS--yes, 29-31C is too hot.

 

[Track]

The author of this was born in 1938, a time when women had little rights. She is a historian of early America and the history of women and a university professor at Harvard University. This the title of a book and is about important women in history and the ruckus they had to raise--people like Rosa Parks.

The way I take the quote is that women have HAD TO raise a little hell to be "heard"--if all women remained quiet and prim and proper, we may still not be able to vote. I have had an interesting life in that I have had a lot of "guy jobs". I have had to fight and kick to get the things I did. I found that I had to work harder and know more than the men who did the same job just because I was a woman. I have been turned down for jobs or not promoted because I was a woman. Things are far better, but we really are still a ways away from true sexual equality.

PS--yes, 29-31C is too hot.

Oh, I know! When I own my own business (with the money I will make off of the marijuana that I will continue to grow), I hope to hire as many female employees as possible. I think women are overlooked in the work-force because they have qualities that most men don't perceive, such as an ability to learn new skills quicker.

But I still think the quote is a little too feminist. I'm more of a huminist myself.

I'm going to try and get my air-conditioner onto the window in my grow room, but it's a big muthafucka and the window isn't made for it.. back to the drawing board