Lumens=wtf?!?!?!

Dragonsmoke

Dragonsmoke

Well-Known Member
So let me get this right.. I seem to be coming back to this over and over. Forgive me for lack of a degree in Knowitallism. It seems to me that 10,000 lumens per plant in the 6500k spectrum regardless of choice in source i.e. HPS, Mh or CFL oh and HID. Right??? Please tell me this is right or close to right...:roll:
 
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dbo24242

New Member
umm it depends on distance and stuff. You can't really say somethign like 10,000 lumens a plant. 1000w hps = 150,000 = 8'x8' area with a good reflector. However, I use a 1000w for a smaller area and it works out. You can't have too many, thats for sure.
I guess 10,000 is a decent estimate for smaller plants.
 
LUDACRIS

LUDACRIS

New Member
LUDACRIS said:
https://www.rollitup.org/general-marijuana-growing/723-things-know-about-lighting.html


LUDACRIS.
Click to expand...


^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
How much light is needed?
The minimum amount of light required by marijuana plants is around 3000 lumens per square foot. However, it's not 100% accurate, since although you may have a 10,000 lumen light, the amount of light that reaches the plant varies with the distance between the light and plants, and reflectivity of the grow box. The ideal amount is somewhere around 7000-10,000 lumens/sqft, and as long as the plants do not burn, as much light can be used as you want.
(*note, the sun produces about 10,000 lumens/sqft, on a sunny summer day).
 
Dragonsmoke

Dragonsmoke

Well-Known Member
Luda! Youdaman!!! I never even considered the lumens of the sun!!! Duh!! Thanks so much dude...for shedding some light on the subject....
:joint::mrgreen:
 
Higher Education

Higher Education

Well-Known Member
LUDACRIS said:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
How much light is needed?
The minimum amount of light required by marijuana plants is around 3000 lumens per square foot. However, it's not 100% accurate, since although you may have a 10,000 lumen light, the amount of light that reaches the plant varies with the distance between the light and plants, and reflectivity of the grow box. The ideal amount is somewhere around 7000-10,000 lumens/sqft, and as long as the plants do not burn, as much light can be used as you want.
(*note, the sun produces about 10,000 lumens/sqft, on a sunny summer day).
Click to expand...

In saying ideal I meant the amount of light that will produce the best vegatative growth while at the same time allowing you to cover the largest grow area possible. 10,000 lumens may be more productive for a single plant, but not neccesarily when you could have fewer lumens per plant on more plants and yield more overall weight. A decrease from 10,000 to 5,000 lumens would not result in a 50% decrease of yield in the affected area. However, 5,000 lumens per foot over a four square foot area would definately yield more than 10,000 lumens over a one sqaure foot area.
 
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