Gemini Duo 2 Cell light review£165.00

Compact, practical and reliable

BikeRadar score4/5

Gemini has been a top-performing light brand in our tests for years, with impeccable reliability from steadily evolved, improved power platforms every year. This means the twin LED Duo gets uprated to 1600 lumens this year, giving a great mix of focused central punch but smooth progression into peripheral coverage.

That makes the tiny twin-head unit equally usable as a bar light or a helmet light and you even get a headstrap harness included for off-bike use. O-ring attachment is secure in all cases and the small battery will comfortably fit under most stems or drop into a pocket.

The three power levels are accessed with a clear click on a slightly raised rubber button that’s okay to find with gloved fingers. While it runs a practical 20/60/100 per cent power split as the default setting, each step can be programmed up or down in 10 percent stages to suit your personal tastes and run-time needs.

There’s an LED battery life indicator built into the light for accurate run-time rationing as well. If the relatively limited run-time of this two-cell version is likely to restrict your night-time play time then there’s also a double capacity four-cell battery option. This year Gemini has even bolted three Duo head units together to create the new remote controlled 3600 lumen Titan.

  • Weight: 213g
  • Run time: 1:50hr

This article was originally published in What Mountain Bike magazine.

Guy Kesteven

Freelance Writer, UK
Guy started filling his brain with cycle stats and steaming up bike shop windows back in 1980. He worked the other side of those windows from '89 while getting a degree in “describing broken things covered in mud" (archaeology). Dug historical holes in the ground through the early '90s, then became a pro bike tester in '97. Guy has ridden thousands of bikes and even more components the world over since then and can remember them all in vivid, haunting detail. Can't remember where the car keys are, though.
  • Age: 45
  • Height: 180cm / 5' 11"
  • Weight: 68kg / 150lb
  • Waist: 76cm / 30in
  • Chest: 91cm / 36in
  • Discipline: Strict sadomasochist
  • Preferred Terrain: Technical off-piste singletrack and twisted back roads. Up, down, along — so long as it's faster than the last time he did it he's happy.
  • Current Bikes: An ever changing herd of test machines from Tri bikes to fat bikes and everything in between.
  • Dream Bike: His Nicolai Helius AM custom tandem
  • Beer of Choice: Theakston's Old Peculier (not Peculiar)
  • Location: Yorkshire, UK

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