The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out.
High pressure sodium street light fixtures.
Two varieties of such lamps exist.
Outdoor fixtures include roadway lights for lighting streets or parking lots and landscape lights for accent lighting of building exteriors and gardens.
When deciding high pressure sodium vs led it s first best to describe each one in depth since both produce light in different ways.
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.
Sodium lamps were first produced commercially by philips in holland in 1932.
They emit bright yellow light.
Sodium bulbs can last up to 20 000 hours.
High pressure sodium lights are used for illuminating large outdoor areas.
Woods l1730 cci modern high pressure sodium security farm light powder coated housing 1 ed17 lamp 120 v 75 w 70 watt 3 4 out of 5 stars 13 71 79 71.
400 watt high pressure sodium replacement 120w led corn bulb mogul e39 base retrofit flood fixture commercial security light 5000k daylight parking lot street lights 4 7 out of 5 stars 5 get it as soon as fri oct 2.
Hps bulbs use sodium particles and gases to produce light.
There are two kinds of sodium lights.
Woods l1730 cci modern high pressure sodium security farm light powder coated housing 1 ed17 lamp 120 v 75 w 70 watt 3 4 out of 5 stars 13 71 79 71.
Fixtures used for indoor lighting range from under cabinet fixtures for shining light onto countertops to bay lights for delivering large amounts of light from a high ceiling to the floor.
Low pressure lps and high pressure hps these lamps are mostly used for street lighting as well as industrial uses.
Outdoor sodium lights are either low pressure or high pressure lighting to illuminate large areas with bright light.
Hps fixtures are an improvement over low pressure sodium lps bulbs because of a better color rendering index color of light appears more natural.
Low pressure and high pressure low pressure sodium lamps are highly efficient electrical light sources but their yellow light restricts applications to outdoor lighting such as street lamps where they are widely used.