Satco Products HID Lamps manual Mercury Vapor, Metal Halide, Major HID Categories, Open Fixture

Major HID Categories

Mercury Vapor				Open Fixture
The original of the three HID categories				Applications
operates by using a small amount of			Frame
liquid mercury sealed in a quartz tube					Open
with argon gas. The arc created by						Enclosed
the mercury vapor lamp produces					Fixture	Fixture
both visible and invisible (UV) light.				Medium Base	Lamp	Lamp
The visible light is blue-white in
			Envelope	The narrower			The wider
color and is best suited for outdoor
			BT28	EDX17 neck
							bulb neck will
lighting applications because of its			Arc Tube	allows full			not fit past
poor color rendering capabilities.				insertion into			the ceramic
Some mercury vapor lamps			Electrode	the socket			neck of the
incorporate phosphors similar to							socket.
those used in fluorescent lamps to
improve color to a certain degree.		Starting		Mogul Base
Mercury vapor lamps can achieve	Electrode					EX26 Socket
		(Probe)		The extended			The standard
life spans of 10,000 to 24,000 hours.
				center			center
Typical applications:				contact			contact
				completes			won’t reach
Street lighting, industrial hi-bay, parking			Starting	the circuit in
			Resistor				the contact in
lots, building flood lighting, general flood				the socket.		EX39 Socket	the dedicat-
lighting, places where long life is required							ed socket.

and color rendering is not critical.	Stem
		Base	Open fixture rated bulbs have dedicated lamp
			bases that will only fit and work with fixtures
			that have corresponding sockets.

Envelope BT37

Spacer

Upper

Support

Arc Tube

Strap

End Paint

Return Lead

Arc Tube

Electrode

Connector

Lead

Metal Halide

Metal halide lamps are similar to mercury vapor models except for the addition of metal

halides of sodium iodide and scandium iodide. Certain metal halide lamps feature other iodides to improve the efficiency and color balance of the lamp. Metal halide represents the most popular and widely used HID category.

Typical applications: General lighting such as commercial/industrial/outdoor flood lighting where good color

and high efficiency are desired.

Dome Mount

Support

Hermetic

End Seal

Alumina

Arc Tube

There is a series of HID lamps that has a protective glass shroud around the arc tube that acts as a barrier to block any particles from exiting the lamp’s outer bulb.

Since the arc tube of the HID lamp is a highly pressurized environment, it is mandatory that the fixture that houses the lamp have a protective lens. This lens will contain glass fragments or other hot particles should the arc tube experience a failure.

Lower

Support

Steel

Frame

Stem

Base

High Pressure Sodium/

Low Pressure Sodium (SOX)

This series of HID lamps incorporates solid sodium, mercury and xenon or a neon/argon gas mixture within the arc tube. This combination of metals and gasses produces an orange-white light in the high-pressure version and a yellow light in the low-pressure model. Both lamps boast a luminous efficiency that is much greater than its mercury vapor or metal halide counterparts.

Typical applications:

Street lighting, industrial hi-bay, parking lots, building flood lighting and general area lighting.

Weather

Resistant

ET18 Envelope

Vacuum

Residue

Gas Getter

Base