IES Flood Report Lumen Array

The Lumen array tab displays the average zonal lumens for each foursome of angles within the entire exploration. Zonal lumens are computed by multiplying the average candlepower within the zone by the appropriate zonal constant. Zones inside of the ClosedNEMA beam designation (10% avg. max. cd.) are marked with a star (*).

NEMA Type

Field Angle degree range

0*

< 10

1

10 to 18

2

18 to 29

3

29 to 46

4

46 to 70

5

70 to 100

6

100 to 130

7

130 and up

* NEMA Type 0 is actually considered a spotlight instead of a floodlight.

 

If a multiplier is present in the photometric file, all candela values will be multiplied by this constant to display the real candlepower values for the exploration.