From Wikipedia, high pressure sodium lamps use xenon, whilst low pressure ones use neon with a small amount of argon. See entry for 'sodium vapor lamps'
Argon gas is used in sodium vapor lamps to provide the starting mechanism for the lamp. When the lamp is turned on, the argon gas helps facilitate the initial discharge of electricity through the lamp. Neon gas is used to help improve the color rendering of the lamp, making the light emitted appear more natural and pleasant.
The abbreviations are CFL - Compact Fluorescent Lamp, MHL - Metal Halide Lamp, HPMV - High Pressure Mercury Vapor, and one more is HPS - High Pressure Sodium lamp
Sodium lamps can be dimmed but we shall have to look at the effect of low voltage on lamps
yes No Rafe, it will not. Remember when you tried it.
The bulb should be in the red end of the light spectrum. One HID lamp is the high pressure sodium lamp.
Sodium lamps typically use a low-pressure sodium (LPS) or high-pressure sodium (HPS) gas. Low-pressure sodium lamps contain primarily sodium vapor, which emits a characteristic yellow light when ionized. High-pressure sodium lamps, on the other hand, contain a mixture of sodium and other gases such as xenon, which helps to start the lamp and enhances its light output. Both types are commonly used for street lighting and industrial applications due to their efficiency and brightness.
HPSV stands for High Pressure Sodium Vapor lamp. It is a type of high-intensity discharge (HID) lamp commonly used for outdoor lighting, street lighting, and agricultural applications due to its high energy efficiency and long lifespan. HPSV lamps produce a warm white or yellowish light and are known for their ability to provide good visibility and color rendering.
The High pressure sodium grow lights kits usually contain a ballast, a reflector, a lamp, a power cord and plug. But, the items may vary by the brands of kits you purchase.
High pressure sodium lamps are beneficial for outdoor lighting because they are energy-efficient, have a long lifespan, provide a bright and consistent light output, and are cost-effective in the long run.
In a low pressure sodium vapour lamp, argon or neon gas is first heated up to emit a slight red or purple glow. The heat from this warms sodium metal in the light to the point of vaporizing, which is when the familiar yellow glow begins.
The type of gas commonly used in an arc lamp is typically a noble gas such as xenon or mercury vapor. These gases are chosen for their ability to produce a bright and steady light when an electric current is passed through them in the lamp.
I believe it's there to remove impurities from within the outer glass envelope that would otherwise attack the arctube