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.

How often should you replace high pressure sodium and metal halide grow lamps. The products are sodium oxide and aluminum. 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. 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.

6 na al 2 o 3 3 na 2 o 2 al. 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. They are to be viewed as guidelines and not mandated criteria. 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.

Any cri value over 80 will show colors true to life. At end of life high pressure sodium hps lamps exhibit a phenomenon known as cycling caused by a loss of sodium in the arc. A big driver behind their use is their. 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.

We provide the following guidelines to assist you in determining if your patient is appropriate for hospice care. It is often difficult to determine when a patient may have a life expectancy of six months or less. At the end of life many types of high intensity discharge lamps exhibit a phenomenon known as cycling. They are commonly used in public parking lots roadways and other security areas.

These lamps are used for gen eral lighting applications where high efficiency and long life are desired but color is not critical. High pressure sodium lamps tend to cycle off and on at the end of life. These lamps can be started at a relatively low voltage. Basic operation in a high pressure sodium lamp a compact arc tube contains a mixture of xenon sodium and mercury.

A bulb s estimated yearly cost is based on 3 hours of usage per day at 0.