What are the common lights?

We briefly introduced the common types of lamps before. Today, let's look at the common artificial light.

Category 1: incandescent lamp

An electric light source that heats the tungsten filament in the lamp to incandescent state and emits visible light through thermal radiation.

It is mainly composed of glass shell, filament, conductor, induction column and lamp holder.

Its advantages are close to sunlight, pleasant light color, continuous spectrum and high color rendering, with an index above 95, and it is suitable for artistic lighting and decorative lighting.

Disadvantages are low light efficiency, low working atmosphere color temperature, high power consumption and short service life, about 1000 hours.

Category 2: Halogen lamps

Halogen bulb is called halogen lamp or halogen lamp for short, also called tungsten halogen bulb and quartz bulb, which is an improved version of incandescent lamp.

Its principle is to inject halogen gas such as iodine or bromine into the bulb. At high temperature, the sublimated tungsten wire reacts with halogen, and the cooled tungsten will solidify on the tungsten wire again, forming a balanced cycle to avoid premature fracture of the tungsten wire.

Halogen lamp not only inherits the advantages of good color rendering of incandescent lamp, but also has a longer life and higher luminous efficiency than incandescent lamp.

Category III: Fluorescent lamps

Fluorescent lamp is a low-pressure mercury lamp, also called fluorescent lamp, which consists of lamp tube and inductive ballast. Phosphors play a key role in the quality of fluorescent lamps. The mercury vapor in the lamp tube releases ultraviolet rays after being electrified, and the fluorescent powder emits visible light after absorbing ultraviolet rays.

Common fluorescent lamps include straight tube fluorescent lamps, colored straight tube fluorescent lamps, annular fluorescent lamps and single-ended compact energy-saving fluorescent lamps.

Its advantages are high luminous efficiency, various color temperatures and long service life, about 2500-3500 hours.

Disadvantages are discontinuous spectrum, flickering light and mercury pollution.

Category 4: energy-saving lamps

Energy-saving lamps, also known as energy-saving bulbs, electronic bulbs, compact fluorescent lamps and integrated fluorescent lamps, refer to lighting equipment that combines fluorescent lamps and ballasts.

Advantages are compact structure, small volume, high luminous efficiency, electricity saving and long service life, which is 6- 10 times that of incandescent lamps.

The disadvantage is that the color rendering index is low and the electronic ballast is easy to be damaged.

Suitable for indoor lighting, office lighting, industrial lighting, hotels, shopping malls and other places.

Category 5: LED lights

LED is the abbreviation of light-emitting diode, which is a solid-state semiconductor element that directly converts electric energy into light energy.

The advantage is more energy saving. The energy consumption of white LED is110 of incandescent lamp and14 of energy-saving lamp. The service life is longer, reaching over 654.38+10,000 hours. No mercury pollution, more environmentally friendly.

Attention should be paid to heat dissipation of LED lamps. If the heat dissipation is not good, it will affect the service life. In addition, you must choose a reliable brand when buying LED lamps to ensure that the color rendering index is above 80.