High Pressure Sodium Lamp End Of Life

Sodium is a highly reactive element and is lost in a reaction with the aluminum oxide of the arc tube.

High pressure sodium lamp end of life.

Basic operation in a high pressure sodium lamp a compact arc tube contains a mixture of xenon sodium and mercury. When it nears end of life as in the case of your lamp reactions with the lamp s alumina synthetic sapphire really shell have depleted much of the sodium from the lamp raising the voltage required to maintain the discharge to a point where when the lamp is fully hot the ballast can no longer provide that voltage causing the lamp to extinguish and re strike when it cools down. As they heat up during operation however the internal gas pressure within the arc tube rises and a higher voltage is required to maintain the arc discharge. It is often difficult to determine when a patient may have a life expectancy of six months or less.

Everest fernandez 31 400 views. They are commonly used in public parking lots roadways and other security areas. How often should you replace high pressure sodium and metal halide grow lamps. 6 na al 2 o 3 3 na 2 o 2 al.

Due to their high efficiency and long life today s hps lamps are also suitable for many interior applications particularly where color rendering is not a crucial concern. Lumalux high pressure sodium sylvania lumalux means today s most efficient light source high pressure sodium lamps deliver more lumens per watt over rated life than most other hid light sources available today. High pressure sodium lamps also known as hps lamps or hps lights are a type of sodium lamp that is widely used in industrial lighting and many public outdoor areas. These lamps are used for gen eral lighting applications where high efficiency and long life are desired but color is not critical.

They are to be viewed as guidelines and not mandated criteria. These lamps can be started at a relatively low voltage. A big driver behind their use is their. This is a result of the lamp requiring more voltage from the ballast to stabilize and operate than the ballast can provide thus the lamps cycle off and on.

Any cri value over 80 will show colors true to life. High pressure sodium lamps tend to cycle off and on at the end of life. Non cycling bulbs prevent damage to ballasts and starters because they remain off at the end of their service life instead of cycling on and off like other high pressure sodium bulbs. At end of life high pressure sodium hps lamps exhibit a phenomenon known as cycling caused by a loss of sodium in the arc.

We provide the following guidelines to assist you in determining if your patient is appropriate for hospice care.