High Pressure Sodium Lamp End Of Life

They are to be viewed as guidelines and not mandated criteria.

High pressure sodium lamp end of life.

A bulb s estimated yearly cost is based on 3 hours of usage per day at 0. 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. These lamps can be started at a relatively low voltage. 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.

At end of life high pressure sodium hps lamps exhibit a phenomenon known as cycling caused by a loss of sodium in the arc. 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. How often should you replace high pressure sodium and metal halide grow lamps. Any cri value over 80 will show colors true to life.

6 na al 2 o 3 3 na 2 o 2 al. At the end of life many types of high intensity discharge lamps exhibit a phenomenon known as cycling. A big driver behind their use is their. It is often difficult to determine when a patient may have a life expectancy of six months or less.

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. High pressure sodium lamps tend to cycle off and on at the end of life. 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. Everest fernandez 31 400 views.

The products are sodium oxide and aluminum. 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. These lamps are used for gen eral lighting applications where high efficiency and long life are desired but color is not critical. They are commonly used in public parking lots roadways and other security areas.

Basic operation in a high pressure sodium lamp a compact arc tube contains a mixture of xenon sodium and mercury.