The Knog Plus is a USB rechargeable LED light with a maximum light output of 40 Lumens. It features 5 modes, with a 2 hour battery life on steady mode and a whopping 40 hours on Eco Flash mode. It's also 100% waterproof and has multiple options for attaching it. Use the small rubber strap to attach it to a handlebar, the large rubber strap to attach it to a stem, or use the clip to attach it to clothing. And best of all, it's only 12 grams, so get one for your heavy Dutch bike. This one is the rear light (red).