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.
High pressure sodium lamp ignitor.
The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out.
These types of lights are commonly found outside.
Outdoor sodium lights are either low pressure or high pressure lighting to illuminate large areas with bright light.
Plusrite 2004 lu150 hps 150w high pressure sodium medium base ansi s55 light bulb.
They are also commonly found in an indoor garden setting.
High pressure sodium lamp hps lamp the hps lamp is the most ubiquitous lamp for street lighting on the planet.
Failed ignitor a less common problem is failure of the ignitor.
A high pressure sodium ballast is responsible for regulating the pressure in light fixtures that use high pressure sodium gas to produce the light.
Sodium bulbs can last up to 20 000 hours.
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Two varieties of such lamps exist.
This type of lighting is effective as a security light with a photocell to.
There is an ignitor built into the ballast which sends a pulse of high voltage energy through the arc.
They are used for things such as security lighting.
Typically these lights are used on sides of industrial buildings and in some street lamps.
Sunlite 03600 su lu35 med high pressure sodium light bulb 35 watts ed17 med medium base e26 ansi code s55 2250 lumen 16000 life hours clear 2100k 4 2 out of 5 stars 257.
Philips 150 watt ed23 5 ceramalux high pressure sodium high intensity discharge hid light bulb model 140961.
Sunlite 03620 su lu150 med high pressure sodium light bulb 150 watts ed17 med medium base e26 ansi code s55 15000 lumen 20000 life hours clear 2100k 4 3 out of 5 stars 284 13 77 13.
They emit bright yellow light.
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.
If the mh lamp starts and a new hps lamp does not start the ignitor probably needs to be replaced.
Metal halide lamps do not require an ignitor to start so the test for a failed ignitor for an hps lamp is to screw in a metal halide bulb of the same wattage and see if it starts.