U-Tech Sodium Vapour Lamp for Research Polarimeter SSI-191

U-Tech Sodium Vapour Lamp for Research Polarimeter SSI-191 is a type of high-intensity discharge (HID) lamp that produces light by passing an electric current through a mixture of noble gases and sodium vapor. It is commonly used for outdoor lighting, such as street lighting and security lighting, due to its high efficiency and long lifespan.

The main components of a sodium vapor lamp include an arc tube, electrodes, and a sodium ballast. The arc tube is made of transparent material, typically fused quartz, and contains a small amount of metallic sodium and a noble gas such as neon or argon. The electrodes are located at each end of the arc tube and provide the electrical connection.

When the lamp is turned on, an electric current flows through the electrodes, creating a high voltage across the arc tube. This voltage ionizes the noble gas, causing it to emit a faint glow. As the lamp heats up, the sodium metal inside the arc tube evaporates and ionizes, producing a bright yellow-orange light.

The light emitted by a sodium vapor lamp has a relatively narrow spectral distribution, primarily in the yellow range at around 589 nm. This makes it efficient for outdoor lighting applications, as it minimizes wasted light and reduces light pollution. However, the color rendering index (CRI) of sodium vapor lamps is relatively low, meaning they do not accurately reproduce colors.

Sodium vapor lamps are known for their high efficiency and long lifespan. They convert electrical energy into light with minimal heat loss, making them energy-efficient compared to other types of lamps. The lifespan of a sodium vapor lamp can range from 16,000 to 24,000 hours, significantly longer than traditional incandescent or fluorescent lamps.

To operate a sodium vapor lamp, a sodium ballast is used. The ballast controls the electrical current and voltage supplied to the lamp, ensuring stable operation and preventing damage. Sodium ballasts are typically magnetic ballasts, which use inductive coils to regulate the current.

In summary, a sodium vapor lamp is a high-intensity discharge lamp that produces light by passing an electric current through a mixture of noble gases and sodium vapor. It is commonly used for outdoor lighting due to its high efficiency and long lifespan. Sodium vapor lamps emit a yellow-orange light and have a narrow spectral distribution, making them energy-efficient and suitable for minimizing light pollution. They require a sodium ballast to control the electrical current and voltage.

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