The one demonstrated in the video or described in the pledge page wouldn't. I've since learned here is an alternative flawed solution in the updates section.
Other than for the "cool" factor (which suits his old-fashioned bike), good old fashioned clip-on reflectors will do a far better job.
Other than for the "cool" factor (which suits his old-fashioned bike), good old fashioned clip-on reflectors will do a far better job.