Distance between light and plant?

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Extortion22

Well-Known Member

• Jan 24, 2009

• #1

As you can see in the picture here, my light is on a can of paint right now. I just got the metal strip I need to mount my ballast to the box So im going to attempt to hang my lights.

My question is at what distance should the light be hung from those nasty looking clones.

Im going to go look for a reflective fire blanket to staple to the walls of the box to get the temp up.

For anyone who needs to know the light and ballast are a 100 watt NMH.

Thanks guys!

 

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Quickee

Well-Known Member

• Jan 24, 2009

• #2

well first off you need to mount it so the plants grow towards the light...12-20inch

 

Where in the hell am I?

Well-Known Member

• Jan 24, 2009

• #3

Once you've got it hung, try closer to 24" w/the 100W, then see if they want you to slowly start lowering the light towards 'em

 

cannabiscult

Well-Known Member

• Jan 24, 2009

• #4

i get my 2 150watt hps 6inches away and the girls love it!! the further away the more stretching occurs

 

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Bubba Kushman

Well-Known Member

• Jan 24, 2009

• #5

I put the top of my hand uder the light and see how close I can put it without burning. If my hand can take the heat the plants can too. I have a 600whps with glass and air cooling and me plants are 8" away from the glass. I also have a fan that blows right under the glass. I have no heat stress or burning. I use cfls for veg and you can put your plants less then 1" away from the bulbs without burnig them. But keep an eye on them because they grow fast with the lights real close. Use the hand method its old school but it really works!

 

cannabiscult

Well-Known Member

• Jan 24, 2009

• #6

the hand thing works but remember our bodies are at 98 degree and we wont start to feel burning until a much higher point then a plant will because they need a 75-85 degree range and might get stressed but not burnt. cfls are harder to burn plants wiht though, ive never ever burned a plant wiht a cfl but the hps.....well ive learned my lessons the hard way

 

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g0dloki

New Member

• Jan 24, 2009

• #7

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Where in the hell am I?

Well-Known Member

• Jan 24, 2009

• #8

Yes, that does work, I'm not disagreeing @ all! However, I dont want any additional stress for his struggling plants, so I advise hanging the light @ 2', then raising it down slowly (maybe 6" a day) until the plants are more used to the gradually evening heat disbursement

 

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Extortion22

Well-Known Member

• Jan 25, 2009

• #9

Thanks guys. Ill try the hand thing. Ive hng my light but before i saw this post. so i will go in later and make some adjustments. I made a grow journal. here is the link!

https://www.rollitup.org/grow-journals/154337-1st-timer-here.html#post1974332