Ledlenser P17R Handheld LED Torch Here, light source, optics and ease of use are ideally combined. The P series is equipped with a scientifically developed super optic that sets new standards in focusing on technology worldwide. Extensive accessories facilitate immediate entry into and use of the torch series. Luminous flux (Lumen) or maximum light width (meter) measured in the brightest setting when switched on with a new set of batteries or with rechargeable lamps with a fully charged battery. The average value, which in individual cases can deviate by +/- 15% depending on the batteries/rechargeable batteries. Average light duration at the lowest level up to a luminous flux of 1 Lumen.