Green Lighting Ltd » Lighting Layout Calculator

Estimate the number of fixtures needed to light an area to a specified light level.

Enter the following information and click “calculate.”

Parameters

* Square footage of area to be lit:
* Desired footcandles:
* Average number of hours on per year:
* Watts per fixture:
* Number of lamps per fixture:
* Rated mean lumen per lamp:
* Ballast factor (BF):
* Coefficient of Utilization (CU):
* Your electric cost per kilowatt hour:	£
		Click to calculate

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:

Note: This estimator does not include Light Loss Factors (LLF) from ambient temperature,
voltage, dust, and tarnishing.

* Required