smithmds
Active Member
This calculator will tell us how many Lumens our plants receives from a particular distance. Once you know how many Lumens your plants receive at the distance they are from the light, you simply need to figure out how many square feet your plants are covering.
http://www.intl-lighttech.com/support/calculator/inverse_calc
d1 = 1
e1 = total amount of Lumens the bulb(s) is(are) rated at (which is at 1 ft)
d2 = the new distance between your plant and your light(s)
Example:
I raised my 4x 600's up today from 1.0 ft. to 2.33333 ft above the plants. Each of my bulbs are rated at 90,000 L. So (d1) = 1, (e1) = (90,000Lx4) or 360,000, (d2) = 2.33333. This gives me 66,300 L total being received by my plants. Since I have a 6x6, that's 1,841.66667 L/sqft at 2.33333 feet above my plants.
At one foot, they received (theoretically) the full 360,000 Lumens, over 36sqft then that's 10,000 L/sqft.
Hope this helps somebody...it did me today.
http://www.intl-lighttech.com/support/calculator/inverse_calc
d1 = 1
e1 = total amount of Lumens the bulb(s) is(are) rated at (which is at 1 ft)
d2 = the new distance between your plant and your light(s)
Example:
I raised my 4x 600's up today from 1.0 ft. to 2.33333 ft above the plants. Each of my bulbs are rated at 90,000 L. So (d1) = 1, (e1) = (90,000Lx4) or 360,000, (d2) = 2.33333. This gives me 66,300 L total being received by my plants. Since I have a 6x6, that's 1,841.66667 L/sqft at 2.33333 feet above my plants.
At one foot, they received (theoretically) the full 360,000 Lumens, over 36sqft then that's 10,000 L/sqft.
Hope this helps somebody...it did me today.
