1. The problem statement, all variables and given/known data A lamp producing 1600 lumens is 16" away from a window of 0.015m^2 on a wall 0.14m^2, what is the amount of light through the window. 2. Relevant equations lux = lumens/m^2 3. The attempt at a solution Since there's no material in the window, shouldn't it be the full 1600 lumens seen inside?