Lighting Estimator
Estimate the number of fixtures needed to light an area to a specified illuminance.
Variables
Values
Area to be lit:
Sft.
Desired illuminance (footcandles):
Average number of hours on per year:
Watts per fixture:
Number of lamps per fixture:
Rated initial lumen per lamp:
Light loss factor (LLF):
Coefficient of Utilization (CU):
Your electric cost per kilowatt hour:
$
Click on the
light bulb
to calculate;
the results will be shown below:
Results
Estimated number of fixtures needed:
Estimated number of lamps needed:
Estimated fixture spacing:
Watts per square foot:
watts
Total power load:
kW
Energy cost per year: