Emergency Outdoor Lighting Level

7.9.2 Performance of System.
7.9.2.1 Emergency illumination shall be provided for not less than 1½ hours in the event of failure of normal lighting. Emergency lighting facilities shall be arranged to provide initial illumination that is no less than an average of 1 ft-candle (10.8 lux) and, at any point, not less than 0.1 ft-candle (1.1 lux), measured along the path of egress at floor level. Illumination levels shall be permitted to decline to not less than an average of 0.6 ft-candle (6.5 lux) and, at any point, not less than 0.06 ft-candle (0.65 lux) at the end of the 1½ hours. A maximum-to-minimum illumination uniformity ratio of 40 to 1 shall not be exceeded.
7.9.2.2 New emergency power systems for emergency lighting shall be at least Type 10, Class 1.5, Level 1, in accordance with NFPA 110, Standard for Emergency and Standby Power Systems.
7.9.2.3 The emergency lighting system shall be arranged to provide the required illumination automatically in the event of any interruption of normal lighting due to any of the following: (1) Failure of public utility or other outside electrical power supply. (2) Opening of a circuit breaker or fuse. (3) Manual act(s), including accidental opening of a switch controlling normal lighting facilities.

I guess that the 10.8 Lux is related to INDOOR emergency lighting. Does it apply to OUTDOOR lighting as well?

Thanks.

You are asking me for an intrepretation of the regulations. I do not posses the proper training or certification to provide such intrepretations.

Perhaps someone else here can.

When you are OUTDOOR, no emergency. This standard for ensuring minimum Illuminance level for escaping in emergency situation INDOOR.

Just to play devils advocate, what about an open air (sports) stadium, and, in particular, around stairways. Is that considered indoor or outdoor?

only the open to sky play area-ground- is considered OUTDOOR. All other area with roof is INDOOR

In outdoors is normal moonlight enough to see clearly escape routes/objects?.

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