The calculator estimates savings and a simple payback period resulting from the implementation of energy efficient street lighting projects.
Calculator Instructions Select the type of the new equipment from the drop down menu "New Technology"; Select the wattage range from the drop down menu "Fixture Wattage" of the new fixture; Insert the new fixture wattage; Select the wattage range from the drop down menu "Wattage" of new lamps; Insert the new lamp wattage; Click “Apply”. All information about the new lamps will be shown in the table below; Insert general information about the current and new operational mode of the equipment (cells C2:C8 and D2:D5):Operational hours per day for the equipment (cells C2 and D2); Operational days per week (cellsC3 and D3); Number of lamps(cells C5 and D5); Coefficient of the lamps (cell C6) (if no information available please take the same value as cell F14); Lamp capacity (cell C7); The total annual hours of operation for the equipment will be calculated and displayed (cells C4 and D4); The total annual energy consumption of the old equipment will be displayed (cell C8); Insert the cost per kWh consumed in applicable currency (cell C 10); The total electricity costs per year for the old equipment will be displayed (cell C11); Insert lamp price for the new equipment in the applicable currency (cell D 12); The following estimated indicators will be displayed in the table below (row 14):Total electricity costs per year of new equipment (cell C14); Simple payback period (cell D14); Savings (cell E14) (if savings value is negative then "inefficient" will be displayed in the cell).