KATSEYE fans are being encouraged to bring the group's official lightstick, the Eyelighter, to shows on the Wildworld tour, which began in Dublin on 1 September 2026. The tour continues through the UK and Europe before heading to North America, with the first US date set for 13 October in Miami, making the lightstick a key accessory for fans wanting to take part in synchronised concert moments.

The Eyelighter, released in 2025, features a hexagonal star design representing each KATSEYE member and comes bundled with a strap, dust bag, six photocards and an instruction manual. It combines a clear globe bearing the group's cat-eye emblem with a white handle, and uses Bluetooth connectivity to change colour and sync with specific songs during shows. Fans are advised to set the lightstick up via the app before arriving at the venue, rather than relying on in-venue instructions displayed on screen.