HomeMy WebLinkAboutWestfiled Parking Lots - Allow Metal Halide Fixtures (SCE Program)CITY OF PALM DESERT
DEPARTMENT OF COMMUNITY DEVELOPMENT
STAFF REPORT
TO: Honorable Mayor and City Council Members
FROM: Phil Drell, Director of Community Development
DATE: July 14, 2005
SUBJECT: Exception to Outdoor Lighting Ordinance Allowing Metal Halide Fixtures for Westfield
Parking Lot as part of Edison Energy Conservation Program.
Recommendation:
Grant metal halide exception with reduced wattage and light levels as proposed.
Executive Summary:
The mall parking lot is currently lit with 450 watt high pressure sodium light consistent with our
ordinance's goal of protecting the Mount Palomar Observatory. Subsequent to our ordinance's
adoption, extensive outdoor lighting in connection with an Indian casino near Mount Palomar
has significantly compromised its effectiveness.
Westfield is proposing to replace the 450 watt high pressure sodium fixtures (amber light) with
350 watt metal halide (white light) generating a 23% reduction in energy consumption.
Although measured lumen levels will drop 46%, overall visibility will increase due to the human
eye's ability to more effectively discern color and detail with the white light in comparison to the
amber light.
The metal halide has been installed on a trial basis north of Denny's and between the parking
structure with satisfactory results. The reduced overall lighting level seems to produce less
glare.
The ordinance allows the City Council to grant exception to the light source requirements if the
overall objectives are achieved.
As part of the same energy saving program, lighting levels in the parking structures will be
reduced by 14% with an energy savings of 50%.
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STAFF REPORT
CITY COUNCIL
JULY 14, 2005
Submitted by: Approval:
P)qil Drell Homer Croy
Director of Community Development Assistant City Manager for
Development Services
Approved by:
Carlos Ortega G�
City Manager
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Lamp Comparison For Palm Desert Parking Lot
Ex"
Proposed
Lamp Type
LU400
MPR3POOPWEM8
Number of Lamps
1
1
Mons Per Fixture
450
350
Mean Lumens Per Fixture
454M
24500
Rated Life
24000
20000
Color Temp
2100
3700
Color Rendering Index (CRI)
22
70
Addrllonal advantages for new lighting system
Fixtures will be cleaned when retrofit Is performed
White light is a Police preference because It aids in security
More effective lumens will reduce glare
Lumens - Not output
Advantages With Now Sveteni
23%reduction in energy consumption
Reduced Hiah Glare ineffective lumens ---
Increased maintained lumens
Clean White Light/ No amber haze
3 tinxs the quality light
m
m
N
1-+
N
m
m
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N
m
w
A
N
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Ln
Go
A
m
0
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m
m
4
m
N
Lamp Comparison For Palm Desert Ptuking Structure
Exlatlny
Proposed
Lamp Type
MVR250/U
F3MXLSPX4IHLEC
Number of lamps
1
4
Watts Per Fixture
290
144
Mean Lumens Per Fixture
135000
11660
Rated Life
6000
24000
Color Temp
4200K
4100K
Color Rendering Index (CR$
65
82
Additional advantages for new fighting system
Less Harsh light due to the new system being linear and not point Light source
Lower profile lixture allows then to be less visible from the sanding areas
Lumen reduction and CRI improvement WO aid in reductioning glare
Lumens = light output
Advantages With Now System
if one lamp bums out you still 3 more for safety
W% reduction In energy consumption
14% Lumen Reduction will still provide proper light levels
1/4 the coat to n aintain
Clean White Light
Setter quality light
i01
m
N
N
N
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m
cn
N
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