OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.

Issue A 11/08

Page 3 of 6

OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006

Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 visibleLED@optekinc.com www.optekinc.com

CIE Chromaticity Diagram

Normalized Spectral Intensity vs Angular Displacement

60.1 degrees

Spatial Intensity Distribution

Optimal IV COS Star

OV4Zxxxx Series

1.0

.8

.6

.4

.2

-.2

-.4

-.6

-.8

-1.0

Warm

Daylight

Cool

Green

White

Blue

Amber

Red

0