How far should a 1000w bulb be from flowering clones?

[halitzor]

I'm making a new vert hydro system and I got a new 1000w dimmable ballast to use for this grow.

My plan is to make 5 triangles of plywood and attach 4" pvc pipe, either round or fence post, to the pipe in a manner in which I can fit the most clones per triangle. I will then have a manifold pump nutes to the top of each tube which runs to the bottom with gravity and gets recycled to the res. There will be 2 to 3 res's.

I'm debating on how bit to make each triangles dimensions to put the clones the ideal distance away from the bulb.

Anyone got any numbers for me?

 

[El_Toro]

https://www.icmag.com/ic/showthread.php?t=127881

In the first post there's a diagram showing lumen output and approx. how far ur plants should be.

 

[halitzor]

Thank you

 

[IwannatokeNbone]

id just recomend u buy a thermometer and find out how close 82 degrees is to the bulb, or something close to it. all lamps, bulbs, and rooms etc etc have a differant heat signature.

 

[halitzor]

That post didnt help me, it doesnt mention what you said it does.

I don't think you can use 82 degree's as a distance either.

Does anyone else have any input? About how close should I put a 1000w bulb to clones that I only veg for a day or so? Its a 1000w dimmable ballast so I can ease them into it, but still need to know final distance for flowering. I'm building a grow thats never been done before!

 

[dachieftan]

I would say @ least 3.5ft if you have cool temps. @ least 4ft if your above 80F

 

[Rukind]

from my experience, 18 inches from a 1000w hps bare bulb. any closer and the tips start to burn... at least for me.

when doing vertical grows, that luman chart isn't accurate for me.
this chart is more accurate when doing vertical http://www.verticalherbs.com/calculator.html

 

[halitzor]

Yeah 4 feet is wayyyyyyyyyyyyyyy too far.

I was thinking something around 20 inches, not too sure yet.

This is sorta what my setup will look like, a ring of mini dwc tubes each with a flowering clone in it around a central hanging 1000w in a cooltube. I plan to make 4 sections which fit next to eachother to form a square. And the tubes will be in a perfect circle around the bulb. The brightest part of the bulb eye level with the clones.