Green Lighting Lux Meter

1. Easy of use Lux Meter by use phone sensor. 2. Calculate the Energy Efficiency based by EU standard 1194/2012. 3. With solar and indoor lux level indicate. 4. Calculated the cost per year for the lighting equipment. 5. Custom input lumen/lux for calculated the Energy Efficiency. 6. Calibration and adjustment. 7. Center gray level indicator.