Most rear bike lights do one thing at one brightness and hope for the best. The TraceR 4 ReAKT pays attention. It flares up when you brake and when the light around you gets brighter, then eases off for the rider sitting on your wheel. All of that comes from a 35g package delivering up to 200 lumens, charged over USB-C in 90 minutes. A CNC-machined aluminium body and IP67 rating mean it shrugs off a British winter. Pair it with the Trace 4 front light and you are properly visible, day or night, at either end of the bike.

Specifications:

• LEDs: 1 x XPG2
  
• IP Rating: IP67
• Max Lumens: 200
• Battery: 850 mAh Li-Ion
  
• Run Time: 40 Hours (Flash)
• Charging Time: 1.5 hours
• Material: Anodised 6063 Aluminium
  
• Weight: 35g

Included: TraceR 4 Reakt , Seatpost Bracket, USB - C Charge Cable

Photo Credit: Exposure Lights