Total U.S. Housing Units.......................................... 111.1 24.2 7.6 16.6

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 19.5 6.1 13.4

1.......................................................................... 28.6 6.1 1.7 4.4

2.......................................................................... 29.5 6.3 1.8 4.5

3.......................................................................... 14.7 3.1 1.1 2.0

4.......................................................................... 9.3 1.9 0.6 1.3

5 or More............................................................. 9.7 2.0 0.8 1.2

Energy-Efficient Bulbs Used............................. 31.1 8.6 2.3 6.3

1....................................................................... 14.6 3.6 1.0 2.6

2....................................................................... 9.6 3.1 0.8 2.3

3....................................................................... 3.2 1.0 0.2 0.7

4....................................................................... 2.2 0.5 Q 0.4

5 or More.......................................................... 1.4 0.4 Q 0.3

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 14.4 4.9 9.5

1.......................................................................... 23.0 4.0 1.2 2.8

2.......................................................................... 24.9 5.0 2.0 3.0

3.......................................................................... 12.5 2.6 0.9 1.8

4.......................................................................... 6.4 1.4 0.5 0.9

5 or More............................................................. 6.4 1.4 0.4 1.0

Energy-Efficient Bulbs Used............................. 27.9 6.9 1.9 5.1

1....................................................................... 13.6 3.4 0.9 2.5

2....................................................................... 8.9 2.1 0.6 1.5

3....................................................................... 3.0 0.8 Q 0.7

4....................................................................... 1.3 0.3 Q Q

5 or More.......................................................... 1.1 0.3 Q Q

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 4.1 1.1 3.0

1.......................................................................... 14.8 2.3 0.6 1.8

2.......................................................................... 7.8 1.1 0.4 0.7

3.......................................................................... 2.0 0.3 Q 0.2

4.......................................................................... 1.0 Q Q Q

5 or More............................................................. 1.4 Q Q Q

Energy-Efficient Bulbs Used............................. 11.0 2.2 0.5 1.8

1....................................................................... 7.0 1.6 0.4 1.2

2....................................................................... 2.9 0.5 Q 0.4

3....................................................................... 0.5 Q N Q

4....................................................................... 0.3 Q N Q

5 or More.......................................................... 0.3 Q N Q

Lighting Usage Indicators Mountain

Table HC14.13 Lighting Usage Indicators by West Census Region, 2005

 Million U.S. Housing Units

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West Pacific

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
Lighting Usage Indicators Mountain

Table HC14.13 Lighting Usage Indicators by West Census Region, 2005

 Million U.S. Housing Units

West Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

West Pacific

Outdoor Lights on All Night..................................... 25.8 5.7 1.8 4.0

1.............................................................................. 16.8 3.5 1.1 2.4

2.............................................................................. 5.6 1.3 0.4 0.9

3 or More................................................................. 3.4 1.0 0.3 0.7

Gas Outdoor Lights on All Night.......................... 1.3 Q Q Q

1.......................................................................... 0.6 Q Q N

2.......................................................................... 0.7 Q Q Q

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were 

sampled.

 N = No cases in reporting sample.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables