Happy Birthday ICMag! Been 20 years since Gypsy Nirvana created the forum! We are celebrating with a 4/20 Giveaway and by launching a new Patreon tier called "420club".
You can read more here.
Important notice: ICMag's T.O.U. has been updated. Please review it here.
For your convenience, it is also available in the main forum menu, under 'Quick Links"!
Dude... it's all out there for you. You just gotta search!
"....Lumens Per Square Foot
To determine how many lumens per square foot you have, find out the square footage of your space by multiplying the width and depth. Divide the lumens available by your square footage. This will give you lumens per square foot. For example, say your space is 3 feet deep by 4 feet wide, for a total of 12 square feet. The total lumens available from your light(s) is 45,000 lumens, which means you have 3,750 lumens per square foot...."
And this is a quote from another thread in the same section were you posted yours!