Can someone please explain this to me b/c my teacher did a horrible job on explainning this...

Question

can someone please explain this to me b/c my teacher did a horrible job on explainning this...

A public school law requires a minimum illumination of 170 lx on the surface of each student's desk. An architect's specifications call for classroom lights to be located 1.8 m above the desks. What is the minimum luminous flux the lights must deliver?

___ lm

Answer 1

Try looking here for the solution.