Transcription of Calculating Light Loss Factors - Energy
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Calculating Light Loss Factors - Energy
SOLID-STATE STREET LIGHTINGCALCULATING Light LOSS FACTORSCONTACT INFORMATION:Dana BeckwithSenior Transportation Engineer1400 SW 5thAvenuePortland, Oregon 97201 Phone: Why Use Light Loss Factors Standards Lamp Life Light Loss Factors Equipment Factors Maintenance Factors Luminaire Dirt Depreciation (LDD) Lamp Lumen Depreciation (LLD) L70 LALWHY WE USE Light LOSS Factors (LLF) Luminaires age over time resulting in reduced lumen output Recognized standards identify minimum Light level requirements to be maintained on roadways and areas for life of lighting system. IESNA RP-8-00 AASHTO LLF allows the forecasting of system performance over a given lifetime to meet the minimum lighting standards Can help minimize liability system has been planned and designed for future operation, not just for the day it is and Area lighting GoalSecurity, Safety, Commercial Interests, Community PrideSTANDARDS IESNA LM-79-08: IESNA Approved Method for the Electrical and Photometric Measurements of Solid-State lighting IESNA LM-80-08: IESNA Approved Method for Measuring Lumen Maintenance of LED lighting Sources IESNA
maintained on roadways and areas for life of lighting system. IESNA RP-8-00 AASHTO LLF allows the forecasting of system performance over a given lifetime to meet the minimum lighting standards Can help minimize liability – system has been planned and designed for future operation, not just for the day it is installed. 3. Street and Area ...
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