Can you distinguish incandescent, halogen, fluorescent, energy-saving lamps, LED lights?

Update:08 May 2019

Nowadays, there are many kinds of lamps on the market. […]

Nowadays, there are many kinds of lamps on the market. When we choose lamps, we often don't know where to start. Which kind of lamps are more suitable for ourselves? Which luminaire should I use for different environments? Next, let's give you an overview of the more common types of lamps on the market.

First, incandescent lamp

The principle of illumination of an incandescent lamp is to electrically heat the filament to an incandescent state, using an electric source that emits visible light using thermal radiation.

    It’s the kind of light bulb that we used when we were young, and it’s very hot. It’s often an electric bulb that burns off the filament. Less than 10% of the power it consumes can be converted into light energy (only 2% for ordinary incandescent lamps), while the rest is lost as heat. At the same time, the higher the filament temperature, the faster the tungsten filament evaporates, making most incandescent lamps have a shorter life. So although incandescent lamps have many advantages - the color is closest to the sun, the color is good, the spectrum is uniform and not abrupt - but the waste of energy is huge, since the beginning of 2007, the Australian government took the lead in declaring the full elimination of incandescent lamps in legislation. At the beginning, more than a dozen countries and regions have successively released the incandescent lamp elimination plan. China has gradually implemented the phase-out plan from 2011. From October 1, 2016, it is forbidden to sell and import incandescent lamps for general lighting of 15 watts and above.

Summary: If you want to use incandescent lamps as a light source, you will find it difficult to buy in the future.

Second, the halogen lamp

Halogen lamps can be seen as an upgraded version of incandescent lamps. Referred to as halogen bubble or halogen lamp, also known as tungsten halogen bulb, quartz bulb, is a variant of incandescent lamp. The principle is to inject halogen gas such as iodine or bromine into the bulb. At high temperature, the sublimated tungsten wire and the halogen chemically act, and the cooled tungsten will re-solidify on the tungsten wire to form a balanced cycle to avoid premature rupture of the tungsten wire. . Halogen bulbs therefore last longer than incandescent bulbs (almost four times that of incandescent bulbs), while filaments can operate at higher temperatures, resulting in higher brightness, higher color temperatures and higher luminous efficiency.

As an upgraded version of incandescent lamps, halogen lamps have all the advantages of incandescent lamps, but halogen lamps also inherit the disadvantages of incandescent lamps: short life (although longer than incandescent lamps), low luminous efficiency (although already higher than incandescent lamps), Moreover, since the halogen lamp is also a heat radiation source, after the light is turned on or just turned off, since the temperature of the bulb is still high, it is absolutely impossible to touch it by hand.

In addition, incandescent and halogen lamps have a small amount of ultraviolet (UV) and infrared (IR) radiation problems. It is easy to cause facial skin problems, plus ultraviolet radiation, and may even lead to extreme conditions such as sun dermatitis.

     To sum up: If you want to use a halogen lamp as the light source, you need at least UV protection - in other words, the light-emitting part of the lamp head should have a frosted or partially frosted and UV-resistant glass panel.