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Ballasts > HID Ballasts > Metal Halide > Sylvania 51981 (QHE1X250MH 208-277V)

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1 Lamp - 208/277 volt - High Efficiency - Quicktronic - Electronic - EX39 - M138 | Sylvania Metal Halide HID Ballast (Sylvania QHE1X250MH 208-277V 51981)

Sylvania Metal Halide HID Ballast
1 Lamp - 208/277 volt - High Efficiency - Quicktronic - Electronic - EX39 - M138

$179.99

Quantity:

Should ship by June 4. Why?

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Specifications

eLightBulbs Part #:

QHE1X250MH 208-277V

The pricing of $179.99 is per item, not case

	250 watt EX39
	Commercial
	Retail
	Hospitality
	Institutional
	Landscape and architectural lighting

Features

	Highest system efficiency in the industry
	10% increase in useful life
	11% better lumen maintenance
	Up to 25% energy savings
	End-of-life sensing circuitry
	Improved CCT and CRI maintenance
	Ease of installation - one-piece design
	Reduced ballast weight

Lumens (light output)

This refers to the literal measure of the light-output of a particular light bulb, measured in the number of lumens.

Watts (Energy Used)

"Watts" is the term applied to the amount of energy required and used by a particular light bulb. It is an international system unit of power equal to one joule per second. Contrary to popular belief, the wattage of a bulb does not directly measure the brightness; the "lumens" of a light is what defines the actual light output.

Average Lifetime

This refers to an average lifetime rating based on large quantities in test groups. This testing takes into account usage of 3 hours per start for fluorescent lamps and 10 hours per start for HID lamps.

Volts

Voltage is a measure of electrical potential.

Bulb Type

The "Bulb Type" is typically a combination of the style of bulb as well as the width of the bulb. Usually, the first couple letters will indicate the type; "G" would indicate "Globe", "PAR" would indicate "Parabolic Reflector"... The numbers indicate the diameter of the light bulb in eighths of an inch; a "G40" would be a "Globe" style that is "5 inches" in diameter.

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Ballasts > HID Ballasts > Metal Halide > Sylvania 51981 (QHE1X250MH 208-277V)

Sylvania Metal Halide HID Ballast 1 Lamp - 208/277 volt - High Efficiency - Quicktronic - Electronic - EX39 - M138

QHE1X250MH 208-277V

Sylvania Metal Halide HID Ballast
1 Lamp - 208/277 volt - High Efficiency - Quicktronic - Electronic - EX39 - M138