It is good stuff. I have been using such lights for years. I like kayaking, and we have special routes for it with my friends. Sometimes we kayak too slow, and we need to kayak a little bit at night to arrive at the stop point for the night. I bought such LED lights from
vont.com, which are very useful. Most of all because it helps us see each other so in case we love one person we could easily find him just by searching for the lights on the Kayak. It saves a lot of time and also increases safety at night.