From the announcement:
A brand new product to compliment our existing range of Warhammer lighting kits, this is a LED and fibre optic lighting kit for 40k tanks such as the Rhino.
LEDs are provided for headlights and interior lighting with the fibre optics suitable for a range of uses from lighting the computer control panel to lights in a gun or soldier.
4 x 3mm LEDs
LED with 9x Fibre Optic strands (8x 0.75mm & 1 x 1.5mm dia)
coin cell battery holder with on/off switch
Full instructions provided
Choice of LED colours for LEDs and fibre optics.
May be suitable for other Warhammer or vehicle models.