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High pressure sodium lamps produce a brighter, more efficient light compared to low pressure sodium lamps. High pressure sodium lamps also have a longer lifespan and better color rendering properties. However, low pressure sodium lamps are more energy efficient and have a monochromatic yellow-orange light output.
Halogen lamps typically have the highest inrush current among the options mentioned. This is because they contain a tungsten filament that has a lower resistance when cold, causing a surge in current when first turned on. Neon, incandescent, and low-pressure sodium lamps have lower inrush currents compared to halogen lamps.
Sodium vapor produces an orange flame when burned. This is commonly seen in street lights and high-pressure sodium lamps.
High pressure sodium lamps take a while to fully light up, however they are very energy efficient and save the council money.
Sodium (chem symbol = Na) Mercury vapor is also used in street lights. Low pressure sodium vapor street lights are amber/yellow in color, high pressure sodium lights are white and mercury vapor lights glow blueish white.
Sodium vapor lamps are commonly used for outdoor lighting, such as street lighting, parking lots, and sports arenas, due to their high efficiency and long lifespan. They are also used in horticulture to promote plant growth and in industrial settings for high-intensity lighting requirements.