Typical Lumen Outputs and Energy Costs for Outdoor Lighting

(not including sports lighting)

These disclaimers apply to all information on this server.


Christian B. Luginbuhl
U.S. Naval Observatory Flagstaff Station
10391 W Naval Observatory Rd
Flagstaff AZ 86001
cbl@nofs.navy.mil

Version 11.2
28 January 2014


The table below lists initial and maintained lamp lumen outputs for typical products, or specific products if indicated. For products with a range of outputs at a given wattage, the highest typical values are listed. These initial output values are the values considered by most lighting codes that specify shielding requirements based on threshold lamp lumen outputs or limit total lamp lumen outputs for development projects (such as Coconino County, AZ; Cottonwood, AZ; Flagstaff, AZ; Sedona, AZ; Pima County, AZ; Yavapai County, AZ; Cochise County, AZ; Homer Glen, IL).

Per year power costs are based on 4000 hours operation (approximately all night every night) and $0.10/kWh energy cost. Power costs are for lamps only (except for LED fixtures); they do not include ballast losses used with HID (HPS and MH), LPS and fluorescent lamps. Inclusion of these electrical losses will increase electrical consumption for these lights about 10-20%. Cost per 100 "maintained" lumens is calculated using "end of life" outputs and an assumed fixture efficiency of 0.70 for non-LED lighting. "End-of-life" outputs use the following lamp lumen depreciation (LLD) factors: 0.95 (LPS), 0.73 (HPS), 0.70 (LED), 0.80 (FL T-12), 0.90 (FL T-8), 0.62 (standard MH), 0.82 (INC) and 0.93 (TH). LLD values for pulse start metal halide vary for the lamps listed from about 0.44 to 0.66 - typical end-of-life values listed by the manufacturers are used for these products. End-of-life figures, rather than initial or "mean" outputs, are most appropriate when comparing outdoor lighting systems where recommended lighting practices specify minimum maintained illuminances (such as roadways and parking lots) and lamps are changed at burnout - by far the most common maintenance practice.

Actual in-service lumen outputs, power cost figures, and overall operation costs will depend on the particular lamp, ballast, local power rates, and installation and maintenence details. The different lamp types and wattages have differing replacement costs and differing lifetimes before burnout, so lead to different costs associated with lamp replacement. The figures in this table are offered only as approximate though representative values for rough light system power cost comparison and approximate verification of lamp lumen outputs submitted with lighting plans.

LED lighting is a new and fast-evolving technology. Representative figures for cool-white (4000-6000K CCT) products are included for completeness, but the products available are changing almost weekly and lumen packages are highly variable product-to-product and even option-to-option within products.

Light Code Verification: Actual initial lumen outputs of lamps vary from manufacturer to manufacturer, depend on specific lamp and ballast specifications, and for metal halide may depend on lamp orientation. For determining compliance with light codes that have lumen specifications (such as shielding thresholds or lumens per acre caps - see the IDA Outdoor Lighting Code Handbook Pattern Lighting Code or the updated Pattern Outdoor Lighting Code ) the figures presented in this table are considered by most jurisdictions to be adequate. Technically, lighting plan submittals typically are to include the lumen outputs of the actual lamps proposed, but if values from this table are matched to the the lamp type and wattage of the proposed lighting product, they in general will be within about 10% or better of the true output.

"Neon" Lighting: For luminous output of luminous tube or "neon" products, see Typical Lumen Outputs for "Neon" Luminous Tube Lighting.

"Effective" Lumens: For those interested in the effects of the eye's spectral (Purkinje) shift on the relative efficiencies of the various lamp types, see the discussion of these issues in the IDA Outdoor Lighting Code Handbook.

Abbreviations:

LPS = low pressure sodium
HPS = high pressure sodium
MH = metal halide
LED = light emitting diode
FL = fluorescent
IFL = induction fluorescent
PL = compact fluorescent
INC = incandescent
TH = tungsten halogen

Lamp Wattage Lumen Output Power Cost Cost per 100 Lumens*
(initial) (maintained) (per year) (per year)
Low-Pressure Sodium (LPS)
LPS Spectrum 700-350 nm
18 1800 1800 $7.20 $0.57
35 4800 4800 $14.00 $0.41
55 8000 8000 $22.00 $0.40
90 13500 13500 $36.00 $0.39
135 22500 22500 $54.00 $0.34
180 33000 33000 $72.00 $0.31
High-Pressure Sodium (Clear) (HPS)
HPS Spectrum 700-350 nm
35 2250 1643 $14.00 $1.21
50 4000 2920 $20.00 $0.97
70 6300 4599 $28.00 $0.87
100 9500 6935 $40.00 $0.83
150 16000 11680 $60.00 $0.73
200 22000 16060 $80.00 $0.71
250 29000 21170 $100.00 $0.67
310 37000 27010 $124.00 $0.66
350 46500 33945 $140.00 $0.59
400 50000 36500 $160.00 $0.63
430 51500 37595 $172.00 $0.66
Standard Metal Halide (MH)
Metal Halide Spectrum 700-350 nm
150 13500 8413 $60.00 $1.01
175 15000 9348 $70.00 $1.07
250 23000 14333 $100.00 $1.00
360 36000 22434 $144.00 $0.91
400 40000 24928 $160.00 $0.91
1000 110000 67000 $400.00 $0.86
Pulse Start Metal Halide (MH)
Metal Halide Spectrum 700-350 nm
50 3400 1496 $20.00 $1.91
70 5600 2464 $28.00 $1.63
100 9000 3960 $40.00 $1.44
150 14000 8000 $60.00 $1.07
175 17500 11000 $70.00 $0.91
200 21000 13800 $80.00 $0.83
250 25000 16500 $100.00 $0.87
320 33000 21000 $128.00 $0.87
350 37000 24000 $140.00 $0.83
400 44000 28500 $160.00 $0.80
450 50000 33000 $180.00 $0.79
1000 110000 73000 $400.00 $0.79
Light Emitting Diode (LED)
Cool-White LED Spectrum 700-350 nm
63 3400 2380 $25.20 $1.16
90 5400 3780 $36.00 $0.95
140 9996 6997 $56.00 $0.80
210 12300 8610 $84.00 $0.98
T12 Cool-White Fluorescent (FL)
Cool White Fluorescent Spectrum 700-350 nm
21 1190 952 $8.40 $1.26
30 2050 1640 $12.00 $1.04
36 2450 1960 $14.40 $1.04
39 3000 2400 $15.60 $0.93
50 3700 2960 $20.00 $0.94
52 3900 3120 $20.80 $0.96
55 4600 3680 $22.00 $0.86
70 5400 4320 $28.00 $0.93
75 6300 5040 $30.00 $0.86
T12 High-Output (800 ma) Fluorescent (FL)
Cool White Fluorescent Spectrum 700-350 nm
75 5150 4120 $30.00 $1.04
80 5600 4480 $32.00 $1.01
85 6900 5520 $34.40 $0.89
95 8625 6900 $38.00 $0.79
110 9500 7600 $44.00 $0.83
T8 Fluorescent (FL)
T8 Fluorescent Spectrum 700-350 nm
17 1400 1260 $6.80 $0.77
25 2225 2003 $10.00 $0.71
30 2900 2610 $12.00 $0.66
32 3100 2790 $12.80 $0.66
40 3725 3353 $16.00 $0.69
44 4000 3600 $17.60 $0.70
55 5050 4545 $22.00 $0.69
65 6100 5490 $26.00 $0.67
59 5950 5355 $23.60 $0.63
86 8200 7380 $34.40 $0.67
Compact Fluorescent (PL)
PL Fluorescent Spectrum 700-350 nm
7 400 320 $2.80 $1.26
9 600 480 $3.60 $1.07
13 900 720 $5.20 $1.03
18 1250 1000 $7.20 $1.03
23 1500 1200 $9.20 $1.10
26 1710 1368 $10.40 $1.09
32 2400 1920 $12.80 $0.96
42 3200 2560 $16.80 $0.94
Induction Fluorescent (Sylvania Icetron) (IFL)
PL Fluorescent Spectrum 700-350 nm
70 6200 4605 $28.00 $0.87
100 8000 5945 $40.00 $0.96
150 12000 8915 $60.00 $0.96
Incandescent (standard) (INC)
Incandescent Spectrum 700-350 nm
15 120 98 $6.00 $8.71
25 210 172 $10.00 $8.30
40 490 402 $16.00 $5.69
60 855 701 $24.00 $4.89
75 1180 968 $30.00 $4.43
100 1750 1435 $40.00 $3.99
150 2800 2296 $60.00 $3.73
200 3850 3157 $80.00 $3.61
Tungsten Halogen (Quartz) (TH)
Incandescent Spectrum 700-350 nm
75 1400 1302 $30.00 $3.29
100 1800 1674 $40.00 $3.41
150 2800 2604 $60.00 $3.29
200 3600 2952 $82.00 $3.97
250 5000 4650 $100.00 $3.07
300 6000 4920 $123.00 $3.57
500 10100 9393 $200.00 $3.04

* maintained lumen outputs for all non-LED sources are reduced by the factor 0.70 to approximately account for fixture losses.


References:


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