NEMA Types

The light distribution of a floodlight is referred to as "beam spread" and is classified by its "NEMA type".  The NEMA beam spread indicates the two edges where the light intensity photometric spreads horizontal and vertical to 10% of the maximum beam intensity.

For example:

 
 

Asymmetrical beam spread

138 (H)   x

  119 (V)

Horizontal   

   Vertical

= NEMA 7 x 6

 
   

NEMA Beam Spread Classifications

Beam Spread Degrees

NEMA Type

Beam Description
10 up to 18 1 very narrow
18 up to 29 2 narrow
29 up to 46 3 medium narrow
46 up to 70 4 medium
70 up to 100 5 medium wide
100 up to 130 6 wide
130 and up 7 very wide