That light does not qualify as massive light output. However, that said -- I have it, and it's decent, especially for the price. I prefer more light, but that's still better than many people use, and better than most of the Knog lights I've seen out there.

The next step up at DX is a big one -- get one of the about 400 lumen 18650 lights for about $20, a pair of batteries for $8, a $1.80 mount and a $12 charger. MUCH more light, and still cheaper than a Planet Bike Blaze 2w that's not nearly as bright.