Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bright, simple waterproof and lightweight LED safety light

I bought two of these Supernovas to attach to the ends of our kayaks when we tow them behind our bikes. The boats are 14' long and I wanted something bright enough for motorists to see coming up from behind so they didn't rear-end us. The Supernovas are smaller in size than I thought they would be, but are plenty bright and were easy to attach to the kayaks with self-adhesive Velcro. One thing I really like is that the lights are waterproof which is important for our application. We plan to use them on our bikes when not in use on the kayaks.