Recommended Plant to light distance

[faded4life]

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]

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]

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]

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.

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

 

[thexception]

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]

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.

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

 

[faded4life]

awesome....thanks.....

 

[GodSlave]

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]

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

 

[auldone]

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

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

 

[robert 14617]

here is the other one for MH