600W HPS -correct distance to plants?

[curts1]

Hi,
I have my first indoor grow going, I´m using a 600W HPS for veg and flower (growing LR2 and Kwazulu). The plants are doing quite well, the LR´s are starting to flower and the plants are on 12/12. What distance is optimal for this lamp? I´ve tried 60cm but then I get heat issues (have an oscillating fan + inline fan) and no growth in height.
Thanks!

 

[oohcow]

18in-24in

 

[DJXXPLATINUM]

18 to 24 inches unless you incorporate a cool tube!! peace djxx

 

[jdubz206]

aircool your lights if possible. my 600's are about 8" away from the canopy.

 

[curts1]

I think the lamp is about 60-80cm´s from the lamp so I should be good. I´d really like some more stretch to the plants though so maybe I should still back off a bit?

 

[perakko]

don't back it off if they are doing fine, it wont do much to the stretch anyways, they'll be happier with more lite!

 

[Dr Dog]

Basically you want the light as close to the plants as you can get it

I dont recommend anything above 30 c/86 f at canopy level.

I also use a 600 W hps and that bad by raises my room temp by 10 degrees c easily withing a minute, let alone canopy temps.

Get yourself a thermometer for your canopy and try and get your light to a point where you have a canopy of around 25 26 c / 78 f ish.

If you cannot keep the top of your hand at that distance without feeling the heat, your plants will burn.

I would invest in a cool tube or another style of vented reflector

 

[curts1]

The cool tube sounds like an option I´ll be looking into. I never thought it would get that hot as the incoming air is between -12 to +4C.

Running out of bud so I need this grow to finish in record time...