Input
fixture above floor
between fixture & ceiling
Results
Room Cavity Ratio (RCR)—
Light Loss Factor LLF—
# fixtures N (calc)—
Round to integer N—
Resulting Eav—
Method
RCR = 5 · h_rc · (L+W)/(L·W), where h_rc is fixture-to-workplane (H − hwp). LLF = BF · LLD · LDD · RSDD. N = (Eav · L · W) / (lampLm · lpf · CU · LLF). Round up.