knotLight is a wearable, string-shaped portable light developed by aprg®, the product brand of Art and Program Inc. The device consists of two components — a compact controller unit and an illuminated string — that work together to bring light wherever you go. Inspired by a fashion designer's search for a light that could naturally integrate into everyday outfits, the team explored many possibilities before landing on the cord itself as the ideal medium. The result is a soft, flexible light source that feels at home in any context, from fashion to interior design to outdoor activity.

knotLight @ aprg.io: https://aprg.io/products/knotlight/

The device offers rich customization: 15 colors, 6 lighting patterns, and 4 brightness levels, all adjustable with simple button and lever controls. The 90cm string is designed to glow along its entire length and is available in multiple colors including white, pink lamé, and purple-pink border. With a built-in rechargeable battery lasting 2–6 hours, knotLight is truly portable. It can be knotted, woven, draped, or clipped onto bags and clothing, making it a playful, expressive tool for anyone who wants to carry light in their own way.