When it comes to lighting level for installations in grandfathered lighting environments, how are the minimum installation requirements treated in existing buildings that require less than 2-foot candles of illumination?
A – The explanatory materials in RS 6-1 state that some buildings may legally have lighting levels below the current code requirement of 2 foot-candles. RS 6-1 does not mandate higher-performing PL products for such grandfathered lighting environments (i.e. as long as it has an MEA approval it satisfies DOB requirements), but the explanatory materials state that building owners are encouraged to conduct lighting surveys so that they can make informed decisions. RS 6-1 does not mandate increasing lighting levels in grandfathered environments, either. As an additional consideration, some manufacturers claim to have tested their products at 1 foot-candle of fluorescent illumination, while still achieving a minimum brightness rating required per RS 6-1.
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