UL 879A

Standard for LED Sign and Sign Retrofit Kits

1.1.1 This standard covers LED (light emitting diode) kits intended for field installation to retrofit signs already installed in the field and LED kits intended for installation in new signs.

1.2.1 These LED kits are intended to replace the electrical components related to the type of illumination used in a sign, such as neon, fluorescent, and HID. Neon sign components include neon tubes, tube supports, neon power supplies, and all secondary wiring from the neon supply. Fluorescent sign components include fluorescent tubes, ballast, and ballast secondary wiring, and in some cases lampholders.

1.2.2 Retrofit kits include the power supply or transformer, power supply or transformer enclosure, the LEDs and the LED mounting means, and installation instructions.

1.3.1 Component power units may be incomplete with respect to electrical enclosure, mounting, supply connections, etc.

1.3.2 LEDs, secondary wiring, and LED transformers or supplies may be provided separately.


  • Edition Number: 1
  • Edition Date: 12/12/2012
  • Price Code: A
  • Type: ulstd
  • ANSI Approved: 08/16/2016
  • DOD Approved: