Cooper Lighting Envoy manual Energy Savings, Lamp Options, Control Options

ENERGY

ENERGY SAVINGS

Energy savings is important to end users, and in some instances may be a compliance requirement of the project. When comparing past methods to present and future technologies, there is no apparent single method to solve all energy challenges while meeting the multitude of application specific job requirements. Envoy has numerous options to consider when energy savings is desired.

LAMP OPTIONS

Pulse Start Metal Halide/High Pressure Sodium/Compact Fluorescent/Induction-Lamp choice should be the first consideration when addressing energy concerns. Various lamp technologies offer different capabilities in the amount of light that is achievable per consumed watt [defined as efficacy], and the expected lifetime of the light source.

Watts/Lamp Type				Bulb Type	ANSI Code	Nominal Lamp Watts	Initial Lumens	Life [Hours]
175w		MH	Clear	ED17	M57	175	14,000	10,000
200w		MP	Clear	ED17	M136	200	21,000	12,000
175w		MP	Clear	ED17	M152	175	17,500	15,000
150w		MP	Clear	ED17	M102	150	14,000	15,000
100w		MP	Clear	ED17	M90	100	9,000	15,000
150w		HPS	Clear	ED17	S55	150	16,000	24,000
100w		HPS	Clear	ED17	S54	100	9,500	24,000
70w	CF		Coated	GX24q-6	--	70	5,200	12,000
57w	CF		Coated	GX24q-5	--	57	4,300	12,000
42w	CF		Coated	GX24q-4	--	42	3,200	12,000
85w	Induction		Coated	P41	--	85	6,000	100,000

NOTE: Values are per [1] lamp. Information varies; consult manufacturer for specific information.

CONTROL OPTIONS

Consider Envoy’s available control options to vary output and save energy. By harvesting available daylight along garage perimeters, designers can strategically place sensor activated luminaires that can be dimmed during daylight hours. Photo sensors, timers and motion sensors [all available by others] are all viable control methods that can be used to promote energy savings during daytime operating hours.

Hi/Low Dimming [HL]: Available with specific HID lamps and CWA ballast circuits, this option features a PC board within Envoy that allows step dimming through low voltage wires hooked to a control module, making it ideal to harvest natural daylight along perimeters of open parking structures. Compared to the same fixture at full power, this method offers an astounding energy savings of approximately 51% in low power mode.

CF Multi-Switching:Compact Fluorescent makes energy savings possible through dimming or by using multiple lamps and circuits. Fixtures with multiples of two, three and four lamps are able to save energy 33-50% by simply switching 1 or 2 lamps off.

Electronic Ballasts: HID electronic ballasts can be used integrally or remote mounted to save energy 12-15% over magnetic technology and up to 50% energy savings with dimmable electronic ballasts.

			Average	Number				Yearly	Total
Lamp Source					Hours 5	Days/Year	$/kW-hr 6		Savings
			Input Watts	of Fixtures 4				Cost [$]	Per Year [$]
175W	MP [Full Power]		208 1	1250	12	365	.1065	121,282	62,390
175W	MP [Low Power] 2		101 2	1250	12	365	.1065	58,892
[4] 42W		CF [4 Lamps-Full Power]	186	1250	12	365	.1065	108,454	54,227
[4] 42W		CF [2 Lamps-Low Power] 3	93	1250	12	365	.1065	54,227

NOTE: 1 Magnetic ballast CWA circuit. 2 Pulse Start Metal Halide using HL option with Lumark CML Industrial HID dimming system. 3 circuits. Control management by others. 4 Fixture quantity and amount of usable daylight may vary in garage application and design. 6 Average national cost per kilo-watt hour, DOE 2007

Compact Fluorescent lamps using 4CF2 option. Lamps are wired on 2 separate 5 12 hour low power mode used for example, applications may vary.