BLACK DIAMOND ONSIGHT 375 £84 (INCLUDING BATTERY)

The design is simple yet robust, with a rear battery pack linked to a front headlamp via a partly-coiled cable. Power is ‘dual fuel’ via either the BD1800 rechargeable lithium-ion battery or three AAAs. The lithium-ion gives the best output: 400 lumens for 5 hours in max, 200 lumens for 13 hours in medium, and 8 lumens for 110 hours in low. You also get a fully waterproof IP67 rating. VERDICT A well-designed, waterproof headtorch with some nifty features – but it’s a tad over-priced.