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OLSON: A wattage restriction label is a useful tool when meeting this requirement. The wattage of luminaires with permanently installed or remote ballasts, transformers, or similar devices shall be the operating input wattage of the maximum lamp/auxiliary combination based on values from the auxiliary manufacturers’ literature or recognized testing laboratories or shall be the maximum labeled wattage of the luminaire. a: The wattage of line-voltage luminaires not containing permanently installed ballasts, transformers, or similar devices shall be the manufacturers’ labeled maximum wattage of the luminaire. Only the power of the two-lamp operating system would need to be accounted for.ĩ.1.4. A control system could be utilized to allow inboard-outboard control while not allowing all three lamps to operate simultaneously. An example could include a classroom with a three-lamp luminaire where one- or two-lamp operation is desired.
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The major point to note is that the control must be capable of preventing simultaneous user operation. SHANNA OLSON: This is a useful exception if inboard-outboard switching or scene control is utilized.
#Ashrae 90.1 lighting control requirements how to
Confused about how to start planning for the new lighting standard? Shanna Olson, senior lighting designer for KJWW Engineering, offers a few ideas for how to meet the requirements.ĩ.1.3 EXCEPTION: If two or more independently operating lighting systems in a space are capable of being controlled to prevent simultaneous user operation, the installed interior lighting power or the installed exterior lighting power shall be based solely on the lighting system with the highest wattage.