The new 400 set links two of L&M’s thumb-sized Stella units into a useful dark-fighting double act. The heads are split between a focused spot and a broader flood beam. Unlike most twinsets though, a single button controls both, so you can adjust power levels but you can’t run one light or the other.
This works pretty well, with a useable width and power to the separately-aimed double-beam spread. Typically for L&M, everything is really well-made, with surprisingly secure stretch-band bar brackets and totally waterproof dive light connectors to the small three-cell battery.
The lights’ overall output doesn’t come anywhere close to the same priced Lumicycle XPG though, so you’d really have to value the slightly lower weight to choose these.
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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.