Moon - Cerberus Rechargeable Seatpost Mounted Rear Bike Light 150 Max Lumens, Daytime Mode, USB Type C, 140 Hours Max Runtime

Product Information

The Moon Cerberus has a three-sided COB (chip on board) design that supplies outstanding side visibility, an innovative hinge system that makes it compatible with all shapes of seatpost, and a dimmer function that allows you to fine-tune your output and battery life. Unlike other manufacturers, Moon has sensibly kept the mode count to five, sparing the endless scrolling that some require. There are two constants and three flashing, including a retina-searing day flash, my favourite. The Cerberus light does the business at the far end of the bike with one rear LED and two side COB LED strips powered by a rechargeable 500mAh Li-Po battery. Again the flush side button is awkward to find in gloves, but it toggles through two solid and three flashing modes with a “press until you’re happy with the brightness”‘Variable Lumen System’ setting too. With the 50Lm max in the solid modes, 100Lm in the standard flash modes and a brutally bright 150Lm max in the Daylight Flash mode, no one has an excuse for not seeing you. Chain reaction Cycles and CRC are trading names of Wiggle Ltd (In Administration) registered in the United Kingdom at 1000 Lakeside, Suite 310, Third Floor N E Wing, Portsmouth, Hampshire, PO6 3EN, With the VLS feature, each mode can also be adjusted between the minimum and maximum settings pertaining to the mode. Constant modes are limited to 5-50 lumen while flash and steady flash are limited to 10-100 lumen. Daytime flash can be adjusted to the full range of 10-150 lumen which can push the runtime all the way to 140 hours in the lowest 10 lumen setting. Although the three COB LED design of the Cerberus improves side visibility, due to the narrow profile of the taillight side visibility is limited to around 270°. If you’re looking for better side visibility, larger lights like the NiteRider Bullet 200 should be considered. Also while the COB LED design looks more visually attractive and is visible during daytime, the beam is less focused than lights like the Bontrager Ion RT or Light and Motion Vya Switch which means the Cerberus isn’t as visible from longer distances. THE VERDICT

Any light worth buying nowadays is rechargeable via USB (we only recommend rechargeable lights in this guide other than our dynamo option) so run time is less important for most cyclists nowadays; but of course, if you plan on doing multi-day adventures without access to electricity very often, you'll want lights with decent battery life unless you go down the dynamo route. Ich würde mir ja wünschen, dass sich alle Hersteller von Lampen und Bikecomputern auf ein gemeinsames Handling ihrer Produkte einigen würden, wenn es beispielsweise um das Ein- und Ausschalten sowie Änderungen der Modi geht.If you're returning to cycling after a very long hiatus, you'll be pleased to know that bike lights have come a long way this century! The rechargeable, LED light is now king, and unlike the notorious Ever Ready lights that were popular in the '70s and '80s, you don't need to spend a fortune on batteries to get your feeble beam to work for a couple of hours. The second buttonis primarily used to vary the lumens. A long press activates the VLS mode and ramps the output from minimum to maximum, just release it at the required setting. The USB-C has reliably charged inside 2 hours. There's a tiny LEDon the side of the light that will glow a steady purple when the battery level is low. Moon Cerberus rear light: value and conclusion Consider what settings you will need. Most modern bike lights come with a number of steady, flashing and pulse modes, so go for some that have options if you're not sure what is best. A popular combination is a steady front light with a rear light on flash mode in urban environments; although, use your judgement to decide on how bright your rear light needs to be if you're running it on flash. Dazzling drivers and other cyclists doesn't really improve anyone's safety, so get a second opinion from friends or relatives if you're in doubt about how bright your beams are to others. The constant modes are a claimed 3:30 and 1:45 but these can be stretched to 18 hours using the VLS button (variable lumen system), which is basically a dimmer switch to preserve battery life or spare your riding mates' eyes. VLS can also be applied to the flashing modes.

Though most modern bike lights are very versatile, there are a couple of things to think about when purchasing a set of bike lights to make sure they're suitable and compatible with your bike.

Your side guardian

In Germany, front lights have to be StVZO-compliant, which means they have a beam that is cut off to avoid dazzling other road users; these are often square as opposed to round. The legislation also requires that front lights must be on constant and not flashing, which means Germans are forbidden from using flashing or pulsing settings. The reasoning for this is because flashing or pulsing lights are distracting, according to the StVZO rules. Emma’s first encounters with a bike were in between swimming and running. Soon after competing for GB in the World Age Group Triathlon Championships in Edmonton in 2001 she saw the light and decided to focus on cycling. Pros: Best-in-class side visibility, fits any seatpost, aerodynamic shape, modes sensibly limited to five