I had a planet bike 1w light and I thought it was the most miserable thing ever. I honestly was afraid to ride with it. I put it on the bike, went about 200 feet from home, turned around and went back home and put my old light on again and never used that light again, it saw about 30 seconds of use.

I don't know why you'd spend $40 on that thing when you can go and get a 1000 lumen light for the same money with rechargable lithium ion batteries, or an 18650 flashlight, a pair of batteries, charger and handlebar mount that's way more light for half the money.