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.
To download, GE Fixture Count Estimator, please Click Here
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.
To download, Siemens Lighting Calculator, please Click Here
by using the same Room Cavity method, this sheet is a good calculator for the Indoor lighting Calculations.
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.
- 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.