Wolframilamppu

Wolframilamppu is the Finnish term for a common incandescent light bulb, also known as a tungsten filament lamp. These lamps produce light by passing an electric current through a thin tungsten wire, called a filament. The filament heats up to a high temperature, causing it to glow and emit visible light. The filament is housed within a glass bulb that is typically filled with an inert gas, such as argon or nitrogen, or a vacuum. This gas or vacuum prevents the filament from oxidizing and burning out too quickly. The glass bulb is often coated with a white powder to diffuse the light and make it softer.

The principle behind the wolframilamppu was first demonstrated by Humphry Davy in 1802. However, it was not until the late 19th century that practical and long-lasting incandescent lamps were developed. Key figures in this development include Thomas Edison and Joseph Swan, who independently created successful designs. The wolframilamppu became the dominant form of electric lighting for much of the 20th century due to its low manufacturing cost and simplicity. However, its efficiency is relatively low, with a significant portion of the electrical energy converted into heat rather than light. In many regions, energy efficiency regulations are leading to a phase-out of traditional wolframilamput in favor of more energy-efficient alternatives like LED and fluorescent lamps.