Giant numen spark tl is a super bright red cob led bike taillight featuring 30 super bright red cob 40chip on board41 led39s giving 30 lumens of light with 5 modes offering a maximum 6 hours run time micro usb rechargeable li ion battery and a quick and easy rubber mounting system round out a high performance rear lightfeatures 30 super bright red 40cob41 leds 5 modes overdrive 4015hrs41 steady 4045hrs41 flash 405hrs41 strobe 4055hrs41 puls