Lamp DNT: device and application
The LNaT lamp is a source of illumination, the work of which is based on burning the arc in the high or low pressure region. This process occurs in a special tube (burner), made in the form of a cylinder of aluminum oxide, filled with sodium vapor, mercury and gas xenon (necessary for ignition). The LNaT lamp also consists of a glass cylinder in which a burner is placed, and a threaded base E-27 or E-40 - depending on the power.
An additional equipment is needed to kindle and burn the arc. This is a ballast (ballast) and a pulse ignitor (IZU). Some companies produce special lamps that do not require IZU. Recently electronic control gear (ECG) instead of ballasts has been used more often. Its use makes it possible to stabilize the power consumption of electric energy, which positively affects the extension of the life of the lamp. The electronic ballast increases the frequency of the current, thus eliminating the 50 Hz flicker effect. During operation, the DVTT lamp glows with a bright orange light, this is due to the presence of sodium vapor in it. It can heat up to 300 degrees, so the cartridge for it is only ceramic. It is installed in luminaires for various purposes. It is powered by an alternating voltage of 220 V.
The LNaT lamp has the following positive characteristics:
- Powerful luminous flux, more than twice the flow of the lamp DRL (this parameter does not deteriorate with long-term operation).
- Long service life. It is about 20,000 hours, while alternative lighting sources will serve a maximum of 10,000 hours.
- Small starting and working currents, which gives a good energy saving.
- Application in a variety of climatic zones.
- Reliable ignition at low ambient temperatures.
- High efficiency, which reaches 30%.
The disadvantages of the LNaT lamp include the following:
- a fairly long time to enter the operating mode, which is about seven minutes;
- a weak color rendition (in bright orange light, other colors are very poorly visible or distorted).
These factors significantly limit its use.
Laminated sodium nanotubes currently have quite a wide field of application as the most cost-effective and efficient source of illumination. They are mainly used for outdoor lighting of roads, pedestrian crossings, sidewalks, parks, production areas, tunnels, etc. Vehicle drivers know how to strain in the dark, when precipitation or when driving in a fog, when lighting is carried out using lamps DRL. Light from sodium sources eliminates these negative phenomena due to the powerful light flux, which increases the contrast of visible objects. They are also used to illuminate the facades of architectural structures. Sodium lamps are used as a source of additional lighting in greenhouses, greenhouses, etc. For this, DNTT is produced with a special spectrum of light radiation useful for plants.
The lamp DNaT price is higher than that of alternative DRL. But it will eventually pay off and in the future will bring significant savings.