What is low pressure mercury lamp?

High-efficiency low-pressure mercury lamps offer 30% to 60% higher output at a spectral output of 254 nm and are ozone-free. Standard low-pressure mercury lamps made of synthetic or natural quartz glass have spectral output at 254 nm and 185 nm and are ozone-generating.

What is the average life of a low pressure mercury lamp?

Low-pressure sodium lamps. They are gaseous, produce 150 lumens per watt, have a life of about 15,000 hours, and are even more efficient than high-pressure sodium.

What is the efficacy of a low pressure mercury lamp?

Mercury vapor lamps are more energy efficient than incandescent and most fluorescent lights, with luminous efficacies of 35 to 65 lumens/watt. Their other advantages are a long bulb lifetime in the range of 24,000 hours and a high intensity, clear white light output.

Where are low pressure mercury lamps used?

Low-pressure mercury lamps are also used as relatively efficient sources of ultraviolet light for applications like UV curing, lithography, UV spectroscopy, solarium, ozone generation, water sterilization and other germicidal irradiation. A particularly high radiance is not required for such applications.

Why is the mercury Vapour at low pressure?

Fluorescent and compact fluorescent lamps work based on the low pressure gas discharge principle. The glass tube on low pressure gas discharge lamps is filled with a noble gas at low pressure and a small quantity of mercury. The discharge process causes the mercury vapor to emit UV rays.

How does a low pressure sodium lamp work?

Working Principle In low-pressure sodium lamps, the discharge takes place in vaporized sodium. The low-pressure sodium discharge emits monochromatic radiation in the visible range. Therefore, unlike low-pressure mercury lamps, they do not need fluorescent powders to convert the wavelength of the radiation.

Are mercury vapor lights banned?

Although the bulbs are still widely available, the United States banned the sale of mercury vapor ballasts in 2008. According to the ban, existing fixtures can remain in service but, as they burn out, they must be replaced with newer, more efficient lighting alternatives.

Why is the Mercury Vapour at low pressure?

How does a low pressure mercury Vapour lamp work?

The glass tube on low pressure gas discharge lamps is filled with a noble gas at low pressure and a small quantity of mercury. The discharge process causes the mercury vapor to emit UV rays. Visible light is emitted as soon as the UV radiation makes contact with the fluorescent.

Do low pressure sodium lamps have mercury?

High-pressure sodium (HPS) lamps have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They contain mercury. Xenon at a low pressure is used as a “starter gas” in the HPS lamp.

Why is HPS better than LED?

The heat per watt is far greater with an HPS fixture compared to LED. This technology is far more efficient in transferring energy in to light, as it produces less heat and has a higher wattage equivalency to HPS (600w vs 1000w).

Can I replace mercury vapor bulb with LED?

LED corn cob lights are one of the most efficient ways to replace metal halide, mercury vapor, and high-pressure sodium HID bulbs.

How big is a low pressure mercury lamp?

Lamps can be made with outputs ranging from approximately 280-1000 nm. The unique concept behind the aperture lamps is that phosphor lines are detected from the reflections; therefore the same lamp exhibits all the spectral lines of the low-pressure mercury as well as the phosphor lines.

What can Mercury medium pressure UV lamps be used for?

The Mercury Medium Pressure UV Lamps are appreciated mainly for two applications: For UV curing and drying For UV disinfection and oxidation

What’s the spectral output of a mercury lamp?

Standard low-pressure mercury lamps made of synthetic or natural quartz glass have spectral output at 254 nm and 185 nm and are ozone-generating.

Which is the best UV low pressure lamp?

UV low-pressure lamps are available in various lengths, with various end connectors and in rod or U-shapes. U-shaped lamps offer higher output in a compact design.