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ATTACHMENT 4 Measure Specific Lighting Savings Per Option A , Pre measurements with annual post spot measurements will be taken to establish energy consumption , for a representative sample of the lights , and pre measurement at full load , with annual post spot measurements for the lighting . These measurements will be accomplished through the use of hand held meters and/or mounting of temporary meters ( by FPL ENERGY SERVICES , INC ) . The results will be used to prorate the calculated savings , thus determining the adjustment ( +/- ) , to be used in the comparison with the Guaranteed Savings . Equations for Calculating Lighting Energy and Demand Savings To determine estimates of energy savings for lighting efficiency projects use the following equation : kWh Savingst = ( (kW/Fixturebaserne x Quantitybase,;,,e - kW/Fixturepost x Quantitypo J x Hours of Operation]r, ,, where : KWh Savings = kilowatt- hour savings realized during the post- installation time period t KW/fixturebasetine = lighting baseline demand per fixture for usage group u kW/fixturepost = lighting demand per fixture during post- installation period for usage group u Quantitybaserine = quantity of affected fixtures before the lighting retrofit for usage group u , adjusted for inoperative and nonoperative lighting fixtures Quantitypost = quantity of affected fixtures after the lighting retrofit for usage group u Hours of Operation = number of operating hours during the time period t for the usage group u , assuming operating hours are the same before and after measure installation Demand Demand savings can be calculated as either an average reduction in demand or as a maximum reduction in demand Average reduction in demand is generally easier to calculate . It is defined as kWh savings during the time period in question ( e . g . utility summer peak period ) divided by the hours in the time period . Maximum demand reduction with respect to cost savings , is typically the reduction in utility meter maximum demand under the terms and conditions specified by the servicing utility . For peak load reduction , for example , the maximum demand reduction may be defined as the maximum kW reduction averaged over 30-minute intervals during the utility' s summer peak period . The maximum demand reduction is usually calculated to determine savings in utility peak demand charges . Annual Reconciliation Indian River County , Florida 12 Indian River County Phase 1 Phase I Rev . 06/09