Emergency Light Photometric Data

Emergency light photometric data is important in determining the proper illumination levels. In a layout of any such system, it is important to note the effect of voltage loss on any illumination source.

In the following example, a 25-watt sealed beam lamp is shown under three conditions:

(1) Bulb Design Voltage;

(2) Nominal System Voltage; and

(3) End of Code Voltage.