Reference Designs : Site Lighting

Reference Designs for Exterior Lighting

Site Lighting : Small Parking Lot Example

Luminaire Specifications:
Luminaire Watts: 106W (70 CRI, 4000K)
Luminaire Lumens : 15000 Lumens
Luminaire Model GE EALP03 F5SM740
Roadway Classification Type VS
Longitudinal Classification Short
Luminaire Efficacy Rating (LER) 142
Maximum UGR 36.1
BUG Rating B4-U0-G2

IES Recommended Footcandles (fc):
Average Maintained Horizontal: 1.5 fc (range 0.75 – 3 fc)
Average Maintained Vertical: 0.8 fc (range 0.4 – 1.6 fc)

Uniformity Ratios
Avg/Min = 4:1
Max/Min = 15:1

Layout:
Number of Luminaires: 3x 2 Head poles (back to back)
Luminaire Spacing: 120′
Mounting Height: 30′
Arm Length: 2′

Calculated Results:
Average=1.79 fc
Maximum=4.0 fc
Minimum=0.7 fc
Avg/Min =2.56
Max/Min=5.71

Baseline Layout (30ft Poles)

SiteLighting1

Lighting Calculations with ISO Lines

SiteLighting_wISO

Lighting Calculations with ISO Lines : Contribution from One Pole Only

SiteLighting_SinglePoleContribution

Lighting Calculations : 20ft Poles

SiteLighting_20ft_Poles

Notes: Light levels are higher but comes at the cost of worse uniformity.

Lighting Calculations : 40ft Poles

SiteLighting_40ft_Poles

Notes: Light levels lower but uniformity still good.