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Lighting Power Densities for External Spaces

 The following table presents, for various external area types:
  • the LPD allowance per ASHRAE 90.1-2004,
  • the % of that allowed by SSc8, and
  • the resultant LPD allowed by LEED SSc8
 
Surface Category General Area Type Specific Area Type LPD Per 90.1-2004 SSc8 Multiplier Resultant LPD
Tradable Surfaces

(Lighting power densities for these area types may be traded.)

 Uncovered Parking Areas Parking Lots & Drives 0.15 w/sq.ft 80% 0.12 w/sq.ft
Building Grounds Walkways < 10' Wide 1.0 w/linear foot 80% 0.80 w/linear foot
Walkways ³ 10' Wide 0.2 w/sq.ft 80% 0.16 w/sq.ft
Special Feature Areas 1.0 w/sq/ft 50% for Landscaping Features 0.50 w/sq.ft
80% otherwise 0.80 w/sq.ft
Building Entrances & Exits Main Entries 30 w/linear foot of door width 80% 24 w/linear foot of door width
Other Doors 20 w/linear foot of door width 80% 16 w/linear foot of door width
Canopies & Overhangs Canopies (including free standing, attached & overhangs) 1.25 w/sq/ft 80% 1.0 w/sq.ft
Outdoor Sales Open Areas (including vehicle sales lots) 0.5 w/sq.ft 80% 0.4 w/sq/ft
Street frontage for vehicle sales lots in addition to 'Open Area' allowance 20 w/linear foot 80% 16 w/linear foot
Non-Tradable Surfaces

 (Lighting power density calculations for these applications may be used only for the specific application and cannot be traded between surfaces or with other exterior lighting. These allowances are in addition to any allowances permitted in the Tradable Surfaces section above in this table.)

 Building Facades 0.2 w/sq/ft for each illuminated wall or surface

or

5.0 w/linear foot for each illuminated wall or surface length

 50% 0.1 w/sq/ft for each illuminated wall or surface

or

2.5 w/linear foot for each illuminated wall or surface length
Automated Teller Machines and Night Depositories 270 watts/location

plus

90 watts/additional ATM per location

 80% 216 watts/location

plus

72 watts/additional ATM per location
Entrances and Gatehouse Inspection Stations at Guarded Facilities 1.25 w/sq.ft of uncovered area* 80% 1.0 w/sq.ft of uncovered area*
Loading Areas for Law Enforcement, Fire, Ambulance and other Emergency Service Vehicles 0.5 w/sq.ft of uncovered area* 80% 0.4 w/sq.ft of uncovered area*
Drive-up Windows at Fast Food Restaurants 400 w/drive-through 80% 320 w/drive-through
Parking near 24-hour Retail Entrances 800 w/main entry 80% 640 w/main entry
* = Covered areas are included in the 'Canopies and Overhangs' section above in this table.

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