The 556-3708-304F is a standard panel mount indicator from the Dialight 556 Series. It features a yellow LED with a domed, transparent polycarbonate lens and a white nickel-plated brass housing. Operating at 16 VDC, this indicator draws a typical current of 20 mA to produce a luminous intensity of 3,250 mcd. Designed for durability, it is rated IP66 and NEMA 4X, making it suitable for outdoor applications exposed to rain and dust. Common uses include instrument panels, transportation signaling, safety applications, and display lighting.