Universal circuit board with several white LED's to fit in most of the passenger cars in the Märklin H0 program. One 73401 board is required for a short car (example: Langenschwalbach cars); two boards are required for long cars (example: UIC-x cars with a length of 28.2 cm / 11-1/8" length). Several of these circuit boards can be plugged together or a board can be shortened. Mounting hardware is included. Depending on the car type, the separate pickup shoe / ground spring set, item nos. 73404, 73405 or 73406 or the 72020 current conducting couplers with the 72050 ground spring is required for electrical connections.
A bright light in the cars: white LED's.
The 73400 lighting kit (softer light for earlier eras) and the 73401 lighting kit (white light for more modern cars) are technically interchangeable.
A 73404, 73405 or 73406 pickup shoe / ground spring set or the 72020 current conducting couplers with the 72050 ground spring are also required for the 73401 lighting kit.