The most high-grade aluminum alloy shell, materials are poor good, the main difference in surface treatment, in general most flashlight as long as there is no special purpose is the oxidation of ordinary, with black, grey. Some flashlight is required to wear surface does not fade, it adopts three stage oxidation treatment, the treated surface is hard, with knife will not trace, but the price is high.
Light cup orange surface cup and glossy cup, cup orange surface surface is uneven orange peel, characteristics of reflective uniform, the irradiation spot beautiful; glossy cup characterized by reflection high efficiency, good light gathering performance, but also is the long-range effect is good, but the irradiation spot outer of the dark. The spotlight is to control the lamp cup, greater focus more distant, can be in more distant as clearly smaller spot to, of course, the current is too small it will not care so far, another cup depth and reflex arc what is the key, if the spot is not perfect will focus is not good, is this lens reflex theory, but the evaluation of general game player or see the businesses and game player to do, see the light cup who is more perfect, the better. A good flashlight, beam is very small, thus far in the distance, can still have a clear spot, if the lighting, the lighting range near the same small lights, do not, instead floodlight cup, light spot, near lighting relatively large range of lighting effect is very good, but the long-range no, this is this relationship, of course focusing exceptions.
