I use this in addition to a rear 250 lumen flashing light so I is often observed!" Reflective Bike/trike safety flags - Substantial visibility, kid safety bike flag, trailer flag, electric power chair flag I've built a movie of it in action but the digicam failed to seize it effectively https://flagpoleforbicycle17492.blogs100.com/24067476/a-simple-key-for-bicycle-flag-unveiled