Non-Residential Lighting Limits Prescriptive Method Lumens per unit area allowance based on need and LZ Absolute photometry Includes general lighting lumens and specific use use it or lose it lumens Designed to match ASHRAE/IES 90.1 and may be interchangeable Performance Method Off site impact is evaluated Maximum off site impacts by LZ Takes reflected light into account Very similar to LRC's OSP method Designed to be computed using standard radiosity software
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