high pressure sodium

green livin

green livin

Well-Known Member
so my 1 1/2 week old plants are getting pretty big and i want to cycle in my 400 watt hps how high up from my plants should i keep my light
 
stumps

stumps

Well-Known Member
set your light about 15" above the plant. put your arm (soft side up) under the light and adjust the light. your too close if the light burns your arm.
 
mygirls

mygirls

Medical Marijuana (MOD)
i have a 1000wtt hps and its 10"away from the top of my girls. it stays at 84 degress at the top of the plants. no heat stress or burns. put your hand under the light for about a min. if your hand gets hot to where you have to pull it back then rais tell its not to hot. good luck
 
DookeyNugs408

DookeyNugs408

Well-Known Member
mygirls said:
i have a 1000wtt hps and its 10"away from the top of my girls. it stays at 84 degress at the top of the plants. no heat stress or burns. put your hand under the light for about a min. if your hand gets hot to where you have to pull it back then rais tell its not to hot. good luck
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ur the man
 
stumps

stumps

Well-Known Member
mygirls said:
i have a 1000wtt hps and its 10"away from the top of my girls. it stays at 84 degress at the top of the plants. no heat stress or burns. put your hand under the light for about a min. if your hand gets hot to where you have to pull it back then rais tell its not to hot. good luck
Click to expand...
lol ya thats what I ment
 
Strawberry

Strawberry

Well-Known Member
Yeah i have 1000 watters and shit only be 15 inchs away.... closer the better as long as it dont burn
 
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