We have (2) separate buildings belong to same owner, there is a open walk way connecting two buildings, each building has 6 stories. Landscape architect have designed some MH lights along the walk way. And they asked if any codes require that we need to provide emergency lights along this path and what minimum foot-candle need to achive when on emergency power (generator)? (1 Foot-candle?), building has generator but it will take sometime to have those MH lights (on generator if needed) to be on after loosing normal utility power.