Flashlight prototype Edison invented the light bulb, Volt invented the battery, invented the real flashlight. However, the light-emitting performance of the bulb is very unstable, sometimes bright and dark, hence the name "Flashlight". It was not until the late 1960s that the "lighting function" ......

1. High energy saving Energy-saving energy without pollution is environmental protection. DC drive, ultra-low power consumption (0.03-0.06 watts per tube) electro-optical power conversion is close to 100%, the same lighting effect is more than 80% energy-saving than traditional light sources.......

1. The number of heads is moderate. Generally, no more than 12 heads should be used for household use. It is better to use 2 to 3 batteries. If it is too large, it is a bit wasteful. You can determine what you need for other special needs. 2. The welding must be firm. Each diode is connected to t......

Look at the aperture, the aperture of a good LED flashlight is a uniform circle, and the light spot of a poor LED flashlight is divided into yellow and blue unevenly distributed.

According to the environment and scope of the flashlight, it has the functions of lighting, intimidation, alarm and high-voltage self-defense.

Headlights are an indispensable piece of equipment for outdoor activities, such as hiking at night and camping at night. Although some people say that flashlights have the same effect as headlights, the new headlights use power-saving technologies such as LED cold light technology, and The innovatio......