LPD

Lighting Power Density (LPD) is the key metric for interiors-only projects. 

LPD Reference Code Comparison Table 

This table displays a comparative analysis of three versions of the ASHRAE 90.1 standard related to the lighting building area method. The intent is to provide insight into where lighting requirements have shifted in terms of building types. The table shows columns including the values from each version of the three codes for the allowable LPD, and then the next column to the right shows the difference between the values of the 2007 version (AIA 2030 Commitment Baseline) and the 2013 version. Additional insight is provided in terms of the degree of change in allowable LPD by the "% decrease" column to the right.

ASHRAE 90.1

2007

2010

2013

Diff b/n 2007, 2013

% decrease

Notes

Building Area Method

 

 

 

 

20%

Average across building types

Automotive Facility

0.9

0.82

0.8

0.1

11%

 

Convention Center

1.2

1.08

1.01

0.19

16%

 

Courthouse

1.2

1.05

1.01

0.19

16%

 

Dining: bar lounge/leisure

1.3

0.99

1.01

0.29

22%

 

Dining: cafeteria/fast food

1.4

0.9

0.9

0.5

36%

 

Dining: Family

1.6

0.89

0.95

0.65

41%

 

Dormitory

1

0.61

0.57

0.43

43%

 

Exercise Center

1

0.88

0.84

0.16

16%

 

Fire station

1

0.71

0.671

0.329

33%

In 2007 Police and Fire station were combined

Gymnasium

1.1

1

0.94

0.16

15%

 

Health-care clinic

1

0.87

0.9

0.1

10%

 

Hospital

1.2

1.21

1.05

0.15

13%

 

Hotel/Motel

1

1

0.87

0.13

13%

Hotel/Motel were combined in 2013. See Hotel

Library

1.3

1.18

1.19

0.11

8%

 

Manuf. Facility

1.3

1.11

1.17

0.13

10%

 

Motion Picture Theater

1.2

0.83

0.76

0.44

37%

 

Multifamily

0.7

0.6

0.51

0.19

27%

 

Museum

1.1

1.06

1.02

0.08

7%

 

Office

1

0.9

0.82

0.18

18%

 

Parking Garage

0.3

0.25

0.21

0.09

30%

 

Penitentiary

1

0.97

0.81

0.19

19%

 

Performing Arts Theater

1.6

1.39

1.39

0.21

13%

 

Police/fire station

1

0.96

0.87

0.13

13%

 

Post Office

1.1

0.87

0.87

0.23

21%

 

Religious Building

1.3

1.05

1

0.3

23%

 

Retail

1.5

1.4

1.26

0.24

16%

 

School/University

1.2

0.99

0.87

0.33

28%

 

Sports Arena

1.1

0.78

0.91

0.19

17%

 

Town Hall

1.1

0.92

0.89

0.21

19%

 

Transportation

1

0.77

0.7

0.3

30%

 

Warehouse

0.8

0.66

0.66

0.14

18%

 

Workshop

1.4

1.2

1.19

0.21

15%