Reflective green light bulb, E 27.

Industrial bulbs are also known as “tungsten” bulbs because light is created when passing through a thin filament (tungsten) heats the filament to incandescence, which then begins to emit light. The specificity of an industrial light bulb is that the emission of light is actually caused by heat.

Today, such light bulbs are widely used, both in domestic and industrial, commercial use, and are suitable for road signaling and use in difficult working conditions. It is economical and provides up to 1000 lm of light with a lifespan of up to 1000h. The energy value of an incandescent lamp is class E.