Grolux 400w

M

macroft1

Active Member

• Apr 8, 2008

• #1

I have 3 plants that are 3 weeks into flower. How close should my 400w grolux light be to the top of the plants??

 

mygirls

Medical Marijuana (MOD)

• Apr 8, 2008

• #2

how much heat r u put out

 

M

macroft1

Active Member

• Apr 8, 2008

• #3

Not too much. The temp in my grow box is about 20 degrees

 

mr west

Well-Known Member

• Apr 8, 2008

• #4

prolly bout 12 to 18 ins if u put ur hand tween plants and light at top of plant if its too hot for the back of ur hand then its too hot for the plant

 

M

macroft1

Active Member

• Apr 8, 2008

• #5

I've had answers ranging from 2" - 18". all a little confusing!

 

GNOME GROWN

Well-Known Member

• Apr 8, 2008

• #6

2" is waaay to close..mr west is rite...put ur hand at the top of ur plants...if it doesnt burn the "back" of ur hand then the plants should be fine...or u could get a thermometer and hold it at the top of the plants and know the exact temp..anything from 70-80 is good! i have a 600 watt hps.mh and o keep it about 18-20 inches from the top of my plants..good luck hope this helped!

 

M

macroft1

Active Member

• Apr 8, 2008

• #7

thanks gnome

 

GNOME GROWN

Well-Known Member

• Apr 8, 2008

• #8

macroft1 said:

thanks gnome

Click to expand...

no prob. man...were all here to help eachother!

 

mygirls

Medical Marijuana (MOD)

• Apr 8, 2008

• #9

just add fans if u get to hot.

 

GNOME GROWN

Well-Known Member

• Apr 8, 2008

• #10

u should have atleast 2 fans any ways..exhaust and intake..u def. always want fresh air coming into ur grow room!