Luu Extreme 4 Cell front light review£175.00

A lot of light for the cash

BikeRadar score3/5

The Luu Extreme 4 isn’t the tidiest or brightest design, but you do get a lot for your money. The single 900-Lumen LED head comes with a selection of diffuser lenses to alter the beam spread.

Unfortunately the broadest spread cap causes a massive output drop to just over 50 lux and there’s a big black hole in the middle of the beam on the most focused setting.

There’s enough light for proper off-roading with the medium filter though and it’s good for the money. Run time is very generous too, and there’s a two-cell version available for £150.

The separate head unit, with metal clip holder, sliding shoe and quick-release mount make it too heavy for helmet use and prone to crash damage. Ours is still soldiering on with some tape and bolt reinforcement though.

Luu extreme 4 cell light: luu extreme 4 cell light
Luu extreme 4 cell light: luu extreme 4 cell light

For more information on how we tested this year's crop of lights, see our latest buyer's guide to mountain bike lights and Tested: 30 high-power mountain bike lights.

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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