PROBLEM $3$:

A general office space measuring $250ft150ft$ is designated for regular office work. The ceiling height is $10$ ft $,$ and all working surfaces are $3$ ft from the floor. Assume ceiling$-$mounted luminaries, white$-$painted ceilings and walls, and luminary cleaning every six months. Specify the appropriate lighting, using fluorescent lamps in prismatic lens fixtures. $($Tip: You may use the handouts and the Tables in the Textbook. Please make sure to include a suggested layout as the last step.$)$