light burn / heat stress??
- Thread starter bankcee
- Start date
I believe that but people say as lomg as its cool to the touch and you could hold your hand under it comfortably that it shouldn't be a problem for your girls. but what do the images seem to be?
Antgotaclue
Well-Known Member
That looks more of it turning bad I maybe wrong but I've just had some light burn and wasn't nowt like that man
OldMedUser
Well-Known Member
I use 400s and a 1000w HID and 8" is close for a 400. 18" is plenty close for a 1000W. 24" when plants are smaller.
I got one of those laser heat guns recently on sale and use that now to make sure the leaves at the top aren't hotter than 85F and adjust my light up or down as needed. Also have a small fan blowing over the canopy to help keep heat from the tops while a 12" oscillating fan blows back and forth across the plants to keep the air mixed well in the room. Room temps are controlled at 75F.
Much more accurate than the hand under the light way to judge temps.
I got one of those laser heat guns recently on sale and use that now to make sure the leaves at the top aren't hotter than 85F and adjust my light up or down as needed. Also have a small fan blowing over the canopy to help keep heat from the tops while a 12" oscillating fan blows back and forth across the plants to keep the air mixed well in the room. Room temps are controlled at 75F.
Much more accurate than the hand under the light way to judge temps.
what does the damage look like to you?I use 400s and a 1000w HID and 8" is close for a 400. 18" is plenty close for a 1000W. 24" when plants are smaller.
I got one of those laser heat guns recently on sale and use that now to make sure the leaves at the top aren't hotter than 85F and adjust my light up or down as needed. Also have a small fan blowing over the canopy to help keep heat from the tops while a 12" oscillating fan blows back and forth across the plants to keep the air mixed well in the room. Room temps are controlled at 75F.
Much more accurate than the hand under the light way to judge temps.
OldMedUser
Well-Known Member
Looks like dehydrated plant tops to me from too high light levels and heat. Those lower burnt leaf tips look like from water. Do you spray your plants?
no but when I water with my wand I think I water the leaves sometimes.
OldMedUser
Well-Known Member
No big deal then.