High Pressure Sodium Lamp Cycling

Typically these lights are used on sides of industrial buildings and in some street lamps. After visual inspection many growers find that some lamps in their greenhouse either aren t operating or aren t doing so at full brightness. Outdoor sodium lights are either low pressure or high pressure lighting to illuminate large areas with bright light.

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They emit bright yellow light.

High pressure sodium lamp cycling. This makes hps lamps especially easy to use in many fixture types. Cri and reduced lamp efficacy. For a while now it s been acting out. High pressure sodium lamps are widely used in greenhouse production but they require maintenance for peak efficiency.

The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out. I have a 150 watt high pressure sodium security light that mysteriously began cycling on and off about a month ago after about three years of faithful operation. This type of lighting is effective as a security light with a photocell to. Dimming is limited to about 50 of full light output.

Sodium bulbs can last up to 20 000 hours. Thought the photoelectric cell. When it opens at night it brightens gradually for about 50 seconds then goes out sleeps for about 80 seconds and that cycle repeats all night. High pressure sodium lights are used for illuminating large outdoor areas.

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. We have a lamp post in front of our house that uses a 50 watts hps high pressure sodium lamp and opens by itself at night using a photo cell. These lamps reduce growth and increase electric consumption. Two varieties of such lamps exist.

High pressure sodium applications hps lamps unlike most metal halides do not require enclosure except to prevent moisture from accumulating on the lamp. 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.