Up to now, the luminous efficiency of a lamp depended on its size and weight. However, Zweibrüders small LED LENSER® P2 definitely does away with the prejudice that big is bright. With a mere 38 g, it weighs less than the end cap of big electric torches. Zweibrüders Tom Thumb has an astounding luminosity and is equipped with the Blue Moon Focus System. The blue circle surrounding its pure white light cone is simply fascinating. For the P2 - as for all of Zweibrüders flashlights - they have spared neither trouble nor expense. The only thing they saved on is weight.