400w mh light distance

secretweapon

Active Member
i have a 1.5 week old plant(full moon, Nirvana) under a 400w mh in a 3x3x6' grow tent. i have the light set at about 30in away from the top of the plant. temps are holding at 80 degrees, humidity is at 45%.

i did a quick search on the site and found this https://www.rollitup.org/general-marijuana-growing/372808-light-distance-seed-starting-tray.html

smallclosetgrowr said "well it depends on how old the seedlings are , if they have just broken the soil i would keep my 400 about a metre away and move it in closer each week. move the light 16-18 inches away when the plants are around the 2-4 week mark"

my question is about how far away should my light be from my plant, i just want a 2nd opinion. :weed:
 
The general consensus is if you put ur hand just above the plant and if it's too hot for ur hand, then it's too hot for the plant.

Peace.
 
i have a 1.5 week old plant(full moon, Nirvana) under a 400w mh in a 3x3x6' grow tent. i have the light set at about 30in away from the top of the plant. temps are holding at 80 degrees, humidity is at 45%.

i did a quick search on the site and found this https://www.rollitup.org/general-marijuana-growing/372808-light-distance-seed-starting-tray.html

smallclosetgrowr said "well it depends on how old the seedlings are , if they have just broken the soil i would keep my 400 about a metre away and move it in closer each week. move the light 16-18 inches away when the plants are around the 2-4 week mark"

my question is about how far away should my light be from my plant, i just want a 2nd opinion. :weed:

when they are young like that you do not want to go by the as long as its not hot on your hand method.

the light needs too be a little higher then norml until they get a little more rooted, i made the mistake b4 with a 600
 
No matter what the age of the plant be it from clone or seed the light distance is key to getting a good crop,Use yr hand has a gage if it is too warm for your hand it is too warm for the plant.Have a fan blowing across the top of any plant or seedling to take away the heat..............................................tyke......................
 
IMG_2321.jpgIMG_2319.jpgIMG_2235.jpgThese are mine 4 weeks after planting seed. I had a lot of issues in beginning but have nursed them back to health. I'm just wondering how come i see so many tall plants indic a and mine so far are huge and bushy any help please!!!
 
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