An LED's plastic body does not determine its color; instead, its color is determined by the semiconductor material used to construct it. Thus, some LEDs may come with translucent or milky bodies and their colors will not be discernible until they are lit.
Video Product Inc's LED Tester provides a quick and easy solution to checking the color, relative brightness, uniformity and functionality of any LEDs.
- VPI's LED Tester (Part #: TESTER-LED)
- LED lights
- 9V battery