Question: A 1 9 5 0 lumen light bulb hangs from a tree limb 7 m above the ground. What is the illuminance ok the ground

A 1950 lumen light bulb hangs from a tree limb 7 m above the ground. What is the illuminance ok the ground at the brightest point? What is the illuminence on the ground three meters away fron the biggest point?

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