Recommended Plant to light distance

faded4life

Active Member

• Jan 6, 2011

• #1

I'm running a 600w HPS light in a 4' x 3' foot enclosed & ventilated setup. What's the recommended distance from the light to the top of the plants? I know they can resist some heat but don't want to burn the tops.

 

auldone

Well-Known Member

• Jan 6, 2011

• #2

Not sure for a 600 but I run a 250 and I have read that it should be 8-12" away. I keep it at 10"

 

auldone

Well-Known Member

• Jan 6, 2011

• #3

Check this thread out. It has a chart on it. 600w 17" away.

https://www.rollitup.org/newbie-central/395962-how-close-have-light-plants.html

 

bloomfields

Active Member

• Jan 6, 2011

• #4

faded4life said:

I'm running a 600w HPS light in a 4' x 3' foot enclosed & ventilated setup. What's the recommended distance from the light to the top of the plants? I know they can resist some heat but don't want to burn the tops.

Click to expand...

depending on your reflector as follows............... vertical (umbrella hood) 1 foot - 600w
horizontal 1.5ft 600w
this is bang on ...good luck

 

thexception

Well-Known Member

• Jan 6, 2011

• #5

easiest guage is your hand, if it is too hot & uncomfortable to hold your hand under the light, at the distance it is away from the tops of your ladies, then it is too hot or uncomfortable for them.

 

bloomfields

Active Member

• Jan 6, 2011

• #6

thexception said:

easiest guage is your hand, if it is too hot & uncomfortable to hold your hand under the light, at the distance it is away from the tops of your ladies, then it is too hot or uncomfortable for them.

Click to expand...

untrue and not a good gauge, i am a chef and my hands can take high temps ........ping!

 

faded4life

Active Member

• Jan 6, 2011

• #7

awesome....thanks.....

 

GodSlave

Active Member

• Jan 6, 2011

• #8

When I ran a 600, I kept it around 12". BUT, if you air cool your reflector or put fans blowing on the canopy, they can take a bit more.
GS

 

robert 14617

Well-Known Member

• Jan 6, 2011

• #9

View attachment 1366577this may help ................

 

auldone

Well-Known Member

• Jan 6, 2011

• #10

robert 14617 said:

View attachment 1366577this may help ................

Click to expand...

sweet. I had seen this somewhere but could not find it!

 

robert 14617

Well-Known Member

• Jan 6, 2011

• #11

here is the other one for MH