no potlike you did not answer my question my question was [purpose look it up]not how many lumens are in a 600w source and not how much intensity is at 3 feet away. so why don't you just move on. oh i moved from third grade to sixth grade thanks and if you read my second post i did ask for a simple answer oh but wait you being a collage boy you might not know what simple is [ simple is a college boy with book learning an no common sense thus simple mindedThat is VERY SIMPLE answer
Intensity = Light at Source/ Distance squared
600w at source = 95,000 lumens
Let's suggest distance 2 feet
Intensity= 95,000/ 2 feet ^2(4)
Intensity = 95,000/4= 23750
Now put it at 3 feet away
Intensity = 95,000/3 feet^2
Intensity = 95,000/9=10,555
-potlike