Three generations of flashlights

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" of the flashlight was completed with the advent of alkaline batteries.

The first generation flashlight

Features: Tungsten filament bulb + alkaline battery, with surface-plated iron sheet as the outer shell. The first generation flashlight, commonly known as "old-fashioned flashlight", generally uses tungsten filament incandescent bulbs, which have low luminous efficiency, short service life, and are easily burned out. The battery uses a large alkaline battery, which has a large capacity but low battery life. The outer shell of the flashlight is made of iron plated on the surface, which is light in weight but simple in craftsmanship.

The second generation flashlight

Features: bulb filled with protective gas + high-performance battery
The second-generation flashlight has a brand new breakthrough in both performance and appearance. A typical representative of the second-generation flashlight is the use of krypton bulbs + alkaline batteries, which have longer bulb life and longer battery life. Aluminum alloy is used as the shell material, and the surface adopts oxidation treatment process, with fine craftsmanship, exquisite appearance, rich colors and good texture.　Another typical representative is the use of xenon bulbs + lithium-ion batteries, which have longer bulb life, greatly improved brightness, and higher color temperature. The concept of "tactical flashlights" has been proposed, which has opened up a new market for flashlights.

The third generation flashlight

Feature: The application of new light-emitting technology-LED. The color temperature has reached an unprecedented height, close to or even exceeding the color temperature of white light, and the power consumption is lower.　The main feature of the third-generation flashlight is the use of LED bulbs. Due to the structure of the LED itself, the reliability is better. The light-emitting mode also appeared on the flashlight for the first time, and once it was launched, it was very popular.