Light Bulbs
A light bulb is an electric lamp that emits electricity by passing current through a filament or light-emitting diode. The main material is glass, and spheres are characterized by various shapes such as cylinder, cone, and long sphere. There are types such as krypton, halogen, jujube sphere, and LED. Krypton can suppress evaporation and oxidation of the filament by using krypton gas with low thermal conductivity. Halogen is characterized by being brighter than ordinary incandescent bulbs due to the halogen cycle, and is used for interior lighting. Jujube bulb is also called Komaru bulb. It is small and has the shape of a jujube fruit . LEDs are lighting that use light emitting diodes. They are characterized by long life and low power consumption.