Light Pollution
اسلاید 1: Light Pollution
اسلاید 2:
اسلاید 3: Why is light directed upward?
اسلاید 4: Light directed upward is wasted.
اسلاید 5: Los Angelesfrom Mount Wilson Observatory1908
اسلاید 6: Los Angelesfrom Mount Wilson Observatory1988
اسلاید 7: Wouldn’t it be more effective to put the lights above and direct it down?
اسلاید 8: Too much light goes upward.needs better shielding
اسلاید 9: better shieldingvery little goes up
اسلاید 10: Mercury VaporHigh Pressure SodiumLow Pressure SodiumStreet Light Spectra
اسلاید 11: Mercury VaporHigh Pressure SodiumLow Pressure SodiumStreet Light Spectra
اسلاید 12: Street Light SpectraMercury VaporHigh Pressure SodiumLow Pressure Sodium
اسلاید 13: Low Pressure Sodium Orion
اسلاید 14: Filtered
اسلاید 15: Low Pressure Sodiumbest outdoor lighting for all safety concernspierces fogexpensive bulbenergy efficientbrighter than high pressure sodium
اسلاید 16: Why don’t people like low pressure sodium?
اسلاید 17: Why don’t you like low pressure sodium?don’t like the colorcan’t see colorlooks like the traffic signalexceptions?
اسلاید 18: high pressure sodium
اسلاید 19: Mercury Vapor
اسلاید 20: Low Pressure Sodium
اسلاید 21: Recessed Lighting
اسلاید 22: Light Trespass
اسلاید 23: Does more light mean less crime?
اسلاید 24: Not Illuminated to Minimum Standards98%Crime80%Adequately Illuminated2%20%
اسلاید 25: loss of night visionglare
اسلاید 26: Light PollutionLosing BattleRational Argument AgainstEmotional Argument in FavorPopulation Growth
اسلاید 27: San DiegoSouthwestern CollegeTexas High Schoolaircraft carriersNY subway
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