Ad
related to: sodium vapor ignitor kit harbor freightebay.com has been visited by 1M+ users in the past month
- Daily Deals
Lowest Prices on Top Items.
Save Money with eBay Deals.
- Trending on eBay
Inspired by Trending Stories.
Find Out What's Hot and New on eBay
- Easy Returns
Whether You Shop or Sell.
We Make Returns Easy.
- Electronics
From Game Consoles to Smartphones.
Shop Cutting-Edge Electronics Today
- Daily Deals
Search results
Results from the WOW.Com Content Network
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.
Sodium-vapor lamps; Xenon short-arc lamps; The light-producing element of these lamp types is a well-stabilized arc discharge contained within a refractory envelope arc tube with wall loading in excess of 3 watts per square centimetre (19 W/in 2). Mercury-vapor lamps were the first commercially available HID lamps.
The introduction of the metal vapor lamp, including various metals within the discharge tube, was a later advance. The heat of the gas discharge vaporizes some of the metal and the discharge is then produced almost exclusively by the metal vapor. The usual metals are sodium and mercury owing to their visible spectrum emission.
Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]
To power an HMI bulb, special ballasts act as an ignitor to start the arc, and then regulate it by acting as a choke. Two types of ballasts exist: magnetic and electronic (square-wave or flicker-free). Magnetic ballasts are generally much heavier and bulkier than electronic ballasts, as they consist primarily of a network of large inductors ...
Harbor Freight Tools won a declassification of the class action; that is, the court found that all the individual situations were not similar enough to be judged as a single class, and that their claims would require an individual-by-individual inquiry, so the case could not be handled on a class basis.
A yellow sticker indicates the lamp is a sodium vapor lamp (HPS/LPS). A blue sticker indicates the lamp is mercury vapor (MV). A red sticker indicates the lamp is metal halide (MH). A sticker that is half-red and half-white indicates a pulse start metal halide lamp (PSMH). Green is also used on HPS units in Canada.
Low pressure sodium lamps were invented first in 1920 by Arthur H. Compton at Westinghouse. The first lamp was a round bulb with two electrodes on each side. The solid sodium metal remained on the bottom center of the bulb. When heated up the metal would vaporize and the lamp would glow yellow.
Ad
related to: sodium vapor ignitor kit harbor freightebay.com has been visited by 1M+ users in the past month