596 LED Circuit Board Indicators Dialight 596 LED Circuit Board Indicators are Bi-Level Prism® SMDs that are designed with a 1.6mm lens. These LED indicators are available in different colour options with a forward current ranging from 2mA to 20mA. The 596 LED circuit board indicators feature a wavelength range of 470nm to 625nm and a viewing angle of 30°. The product is lead-free and RoHS compliant with an MSL of 2 or 3.