594 Prism® LED Circuit Board Indicators Dialight 594 Prism® LED Circuit Board Indicators are small single-level, right-angle indicators for precision electronics. These LED indicators are designed to withstand 260°C peak reflow temperature and provide the aesthetics of a diffused lens for better visibility. The 594 Prism LEDs provide a dominant wavelength range from 525nm to 630nm and luminous intensity range from 2mcd to 312mcd. These LED indicators feature proprietary single-level design for through-hole applications, board-edge mounting in network interface cards, networking hardware, wireless components, electronic testing, and measuring equipment.