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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.
"No" sticker [clarification needed] —600 watts (MH/HPS)—Lamps for commercial or industrial lighting are so rare that there isn’t any NEMA sticker. Most 600 watt HPS lamps are used for growing. Most 600 watt HPS lamps are used for growing.
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]
The setup includes a carbon filter to remove any odors, and an exhaust system to cool the bulb and prevent the HPS from heating up the tent. Air from inside the tent is drawn through the carbon filter and over the bulb, then is exhausted out through the ducting using a powerful exhaust fan. Plants would be placed at the bottom of the grow tent.
The Scotts Miracle-Gro Company is an American multinational corporation headquartered in Marysville, Ohio, where O.M. Scott began selling lawn seed in 1868. [2] The company manufactures and sells consumer lawn, garden and pest control products, as well as soilless indoor gardening equipment. [3]
And right now, you can get a 12-piece set of the brand's cookware that reviewers call "the best cookware I have ever had" on sale for 40% off for a limited time. HexClad $600 $1,000 Save $400