Lighting Calculations Spreadsheets

1- GE Fixture Count Estimator see fig.1

Estimate number of fixtures needed to light an indoor area to a specified light level (foot-candle level).
You need to Click on the first green cell and tab to the other input cells. 

fig.1

To download, GE Fixture Count Estimator, please Click Here

2- Siemens Lighting Calculator see fig.2

this calculator give quick results by using the Room cavity method for lighting calculations.just follow the instructions page and you will get a reliable results.

fig.2

To download, Siemens Lighting Calculator, please Click Here

3- Internal Lighting calculator see fig.3


by using the same Room Cavity method, this sheet is a good calculator for the Indoor lighting Calculations.

fig.3

To download, Internal Lighting calculator, please Click Here







4- Visual Interior Lighting Design Tool

The interior tool use The lumen method to determines average illuminance achieved on the workplane using a derived property of luminaire photometrics and room geometry called the coefficient of utilization.

Usage:

• The Interior Tool will calculate the number of luminaires needed to meet an average illuminance across the workplane for an enclosed rectangular room using the principals of the lumen method. 

• You can also use the Interior tool to determine the illuminance achieved by a specified lighting power density or luminaire quantity.