What's the difference between a reflective bowl and a flashlight lens? What is the focusing effect of convex lens on flashlight? What about other grotesque lenses?

The reflective cup and lens of a flashlight are two common focusing accessories, and you can search for pictures on the Internet. Reflective cups are the most common and common, with a focused beam in the middle and a slightly weak floodlight around the beam, forming a range and focusing illumination mode, which is also the most suitable illumination mode for people's eyesight habits, because people's eyes need both a focused focus and a certain viewing range, so as to have sufficient visual field width in the dark.

The lenses are generally cheap lenses for flashlights, mostly made of acrylic, and generally only have a center beam. The focusing is slightly better than that of small-caliber cups, but it is not as concentrated as that of large-caliber focusing cups. There is generally only one beam formed by the lens, and there is no floodlight around it. When you use it, you will feel that the field of vision is a bit narrow, especially in short and medium distances, and its practical value is not as high as that of a light cup flashlight.

I do titanium lighting for flashlights. At present, the flashlight with strong illumination effect is mainly C 10 flashlight, equipped with 800 lumen single chip CREE XML T6 LED, which is floodlit at medium and short distance, with good long-distance focusing and excellent road lighting effect, and is the first choice for outdoor and night riding. And 18650 small straight board, T6 LED.