Moon Helix Max 250 Lumen Rear Light

The Moon Helix Max is the brightest of the Helix rear lights: 250 lumens from a COB red LED, in an 81 mm CNC aluminium body that is waterproof to IPX7. It thinks for itself, too. An ambient-light sensor switches to a high-output day flash in daylight and back to your chosen mode at night, and motion sensing dims the light when you stop and switches it off if the bike is parked. Three brackets are included so it fits a seatpost, saddle rails or a belt.

• 250 lumens maximum (FL-1 tested), COB red LED
• 5 modes: day flash, steady flash, flash, and two steady settings; Variable Lumen System adjusts output within each mode
• Runtime from about 2 hours on full steady up to around 105 hours flashing
• Intelligent brightness (light sensor) and motion sensing / parking mode
• USB-C charging, 2.5 hours to full
• Mode memory, lock mode, auto safe mode, low-battery / charging / fully-charged indicators
• IPX7 waterproof, 81 × 22 × 19.5 mm, 40 g

In the box: Helix Max light, RB-37-R seatpost bracket with aero and round pads and two strap sizes (20–35 mm and 35–52 mm), RB-38 saddle rail bracket, RB-39 belt clip, USB-C cable.