Blackburn Super Flea rear flasher
The Blackburn Super Flea rear flasher stretches a good design to its true potential with excellent optics, weathertight casings and decent mounting hardware whether affixed to seatposts, clothing or accessories.
Measuring 33x23x46cm it's about as genuinely bijoux as you get while still doing the job on dark nights. Blackburn doesn't quote figures but it seems broadly in thirty-odd lumen territory. Run times are quoted as fifteen hours steady, twenty-eight in flash/strobing.