Wall Light
how do i calculate the illuminance of a wall light?
How do i work out the illuminance of a wall light that is 5 metres up on a wall?
the wall light is 1500 candela so the illuminance directly below the light would be 1500/5 squared = 60
what would be the illuminance 3 metres on the ground away from the wall
Use the square law. The distance will be the hypotenuse, and then it'll be decreased by the cosine of the angle of the triangle.
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