A Light question.....

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HarryRePotter

Active Member

• Jan 4, 2009

• #1

could someone explain to me how many watts/lumens per square foot i have using 2 400w hps in a 4x4x6.5 space?

I just dont understand it. lol

Thanks in advance

 

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shinobi

Active Member

• Jan 4, 2009

• #2

The amout of lumens will vary depending on the light but with 2 400watters you'll have atleast around 90 thousand lumens ( I think) and with a 4x4 space that is 5625 lumens per square foot, which is an acceptable amount for growing

 

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HarryRePotter

Active Member

• Jan 4, 2009

• #3

shinobi said:

The amout of lumens will vary depending on the light but with 2 400watters you'll have atleast around 90 thousand lumens ( I think) and with a 4x4 space that is 5625 lumens per square foot, which is an acceptable amount for growing

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thanks for the quick reply your info is appreciated

 

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HarryRePotter

Active Member

• Jan 4, 2009

• #4

Im using Sylvania Grolux 400 watt Son T Plus bulbs if that makes a difference.

 

ViRedd

New Member

• Jan 5, 2009

• #5

When we are talking about square footage, we are talking about floor space, right? So, with that in mind, you have 16 square feet (4x4). You are using 800 watts of light. The rule of thumb for growing good weed is at least 50 watts per square feet of floor space. You have exactly 50 watts per square foot. Therefore, sit back, relax ... and watch the wonderful miracle appear.

Vi