If you were attending a college where bike lights were required, but you didn't want to comply with "the establishment," then I guess you would have a use for this as a passive-agressive light. Or if you have kids who ride their trikes on the sidewalk and would be tickled to have a real-live light, here you go.
It gives the merest whisper, hint, coy suggestion, of light. I used mine for the first time this morning at dawn. As I walked in the office door, a coworker saw me with my bike gear on and asked if it was me that just came through the west gate. He told me he was driving and didn't see me till the last minute. He had been truly startled--he nearly hit me.
So if you're an adult on a bike needing to commute, my advice is look elsewhere.