Beamer 80 features:* High output surface mounted LED provides high power beam along with Courtesy™ & Superflash™ modes* FL1 tested- Run times: 6.5 hrs(80 lm), 24 hrs(Courtesy™ -24-72 lm) & 70 hrs (Superflash™ - 80 lm)* Provides 130° of visibility * Water resistance rated to IPX5 standard* 2 AAA batteries (included)* A3 cam™ mount adjusts or removes without tools* 63 gramsGrateful Red’s features:* PB 28 LED Power Array™ and reflector provides steady, Courtesy™ & Superflash™ modes * FL1 Tested-Run times: 26 hrs(steady–13 lm), 45 hrs(Courtesy™–4-11 lm) and up to 150 hrs (Superflash™ - 13 lm) * CPSC certified reflector integrated in the lens (16 CFR 1512.16)* Provides 160° of visibility* Highly visible, even in daylight * Water resistance rated to IPX3 standard* 2 AAA batteries (included)* Includes rear rack and seat post mounts for multiple mounting options* 85 grams