9

Example of Photometric Data File 1329

and 180°, respectively. Other wise, they must b e

0° and 180°, respect ively.

15.The set of horizontal angles, listed in increasing

order.Thefirstanglemustbe0°.Thelastangle

determines the degree of lateral symmetry

displayed by the intensity distribution. If it

is 0°, the distr ibution is axially symmetric.

If it is 90°, the distribution is symmetric in

each quadrant. If it is 180°, the distribution is

symmetric about a vertical plane. If it is g reater

than 180° and less than or equal to 360°, the

distribution exhibits no lateral symmetries. All

other values are invalid.

16.The set of candela values. First all the candela

values corresponding to the first horizontal

angle are listed, starting with the value

corresponding to the smallest vertical angle and

moving up the associated vertical plane. Then

the candela values corresponding to the vertical

plane through the second horizontal angle are

listed, and s o on until the last horizontal ang le.

Each vertical slice of val ues must start on a new

line. Long lines may be broken between values

as needed by follow ing the instructions given

earlier.

Here is an example of a photometric data file (page

2–1329).

Ex ample of P hotometr ic Data File

The follow ing is an example of a photometr ic data

file: