Million U.S. Housing Units

Total U.S. Housing Units...................................... 111.1 14.7 7.4 12.5 12.5 18.9 18.6 17.3 9.2

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day....................... 91.8 12.0 6.2 10.0 10.3 15.3 15.9 14.5 7.6

1..................................................................... 28.6 3.5 2.1 3.8 3.3 5.2 5.0 3.6 2.2

2..................................................................... 29.5 4.2 2.2 3.5 3.3 4.9 5.0 4.5 2.0

3..................................................................... 14.7 1.8 1.1 1.4 1.6 2.3 2.4 2.6 1.5

4..................................................................... 9.3 1.3 0.5 0.7 0.9 1.6 1.7 1.7 0.8

5 or More........................................................ 9.7 1.3 0.3 0.6 1.2 1.3 1.8 2.1 1.1

Energy-Efficient Bulbs Used........................ 31.1 3.7 2.0 3.1 3.7 5.7 5.2 4.7 2.8

1.................................................................. 14.6 1.4 0.9 1.6 1.7 2.7 2.7 2.3 1.3

2.................................................................. 9.6 1.3 0.6 0.8 1.3 1.7 1.6 1.4 0.8

3.................................................................. 3.2 0.5 Q 0.3 0.3 0.7 0.4 0.5 0.3

4.................................................................. 2.2 0.3 Q Q 0.3 0.3 0.3 0.2 Q

5 or More..................................................... 1.4 0.3 QQQQQQQ

Number of Lights Turned On

Between 4 and 12 Hours per Day..................... 73.2 9.8 5.1 7.8 8.4 12.4 12.4 11.2 6.0

1..................................................................... 23.0 2.7 2.0 2.7 2.5 4.1 4.2 3.1 1.7

2..................................................................... 24.9 3.5 1.6 3.1 3.0 4.2 3.9 3.7 1.9

3..................................................................... 12.5 1.6 0.9 1.2 1.3 2.1 2.1 2.2 1.1

4..................................................................... 6.4 1.0 0.4 0.4 0.8 1.2 1.1 0.9 0.6

5 or More........................................................ 6.4 1.0 Q 0.4 0.8 0.9 1.2 1.3 0.7

Energy-Efficient Bulbs Used........................ 27.9 3.4 1.9 3.0 3.4 5.1 4.5 4.0 2.6

1.................................................................. 13.6 1.3 0.9 1.6 1.8 2.5 2.3 2.0 1.1

2.................................................................. 8.9 1.3 0.6 0.8 1.0 1.7 1.4 1.0 1.0

3.................................................................. 3.0 0.5 Q 0.3 0.3 0.5 0.5 0.6 Q

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

5 or More..................................................... 1.1 QQQQQQQQ

Number of Lights Turned On

More than 12 Hours per Day............................ 27.0 3.7 1.5 2.9 3.3 5.3 4.9 3.8 1.7

1..................................................................... 14.8 1.8 0.9 1.7 1.6 3.3 2.8 1.9 0.9

2..................................................................... 7.8 1.1 0.5 0.9 1.1 1.2 1.2 1.2 0.5

3..................................................................... 2.0 0.4 Q Q Q 0.3 0.4 0.3 Q

4..................................................................... 1.0 QQQQQQQQ

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

Energy-Efficient Bulbs Used........................ 11.0 1.4 0.5 1.0 1.5 2.2 1.9 1.8 0.7

1.................................................................. 7.0 0.7 0.4 0.7 1.0 1.4 1.3 1.1 0.4

2.................................................................. 2.9 0.4 Q Q 0.4 0.6 0.4 0.5 Q

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

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

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

1970 to 

1979

1980 to 

1989

1990 to 

1999

2000 to 

2005

Table HC5.13 Lighting Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

Lighting Usage Indicators 1969

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
 Million U.S. Housing Units

1970 to 

1979

1980 to 

1989

1990 to 

1999

2000 to 

2005

Table HC5.13 Lighting Usage Indicators by Year of Construction, 2005

Year of Construction

Housing 

Units 

(millions)

Before 

1940

1940 to 

1949

1950 to 

1959

1960 to 

Lighting Usage Indicators 1969

Outdoor Lights on All Night................................. 25.8 3.4 1.9 3.2 2.9 3.6 3.9 4.3 2.5

1......................................................................... 16.8 2.4 1.3 2.3 2.1 2.6 2.4 2.3 1.5

2......................................................................... 5.6 0.7 0.4 0.7 0.7 0.5 0.8 1.2 0.6

3 or More............................................................ 3.4 0.3 Q Q Q 0.5 0.7 0.9 0.5

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

1..................................................................... 0.6 QQQQQQQQ

2..................................................................... 0.7 QQQQQQQQ

 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