Total U.S. Housing Units...................................... 111.1 30.0 34.8 18.4 15.9 12.0

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day....................... 91.8 22.9 29.2 15.6 13.8 10.3

1..................................................................... 28.6 10.9 8.4 4.2 3.1 2.1

2..................................................................... 29.5 7.4 10.1 4.4 4.1 3.5

3..................................................................... 14.7 2.5 5.0 2.9 2.6 1.7

4..................................................................... 9.3 1.3 2.8 2.0 1.9 1.2

5 or More........................................................ 9.7 0.8 2.9 2.1 2.1 1.8

Energy-Efficient Bulbs Used........................ 31.1 6.7 10.3 5.7 4.9 3.5

1.................................................................. 14.6 4.2 5.1 2.1 2.0 1.3

2.................................................................. 9.6 1.7 3.1 1.9 1.4 1.4

3.................................................................. 3.2 0.3 0.9 0.8 0.8 0.4

4.................................................................. 2.2 Q 0.8 0.6 0.4 Q

5 or More..................................................... 1.4 Q 0.4 0.3 0.4 0.2

Number of Lights Turned On

Between 4 and 12 Hours per Day..................... 73.2 17.3 23.6 12.7 11.4 8.1

1..................................................................... 23.0 7.3 7.6 3.6 2.7 1.9

2..................................................................... 24.9 6.4 8.5 4.1 3.6 2.3

3..................................................................... 12.5 2.3 3.8 2.8 2.1 1.5

4..................................................................... 6.4 0.9 2.1 1.2 1.4 0.8

5 or More........................................................ 6.4 0.5 1.7 1.1 1.7 1.5

Energy-Efficient Bulbs Used........................ 27.9 6.0 8.8 5.0 4.6 3.5

1.................................................................. 13.6 3.5 4.2 2.5 1.9 1.5

2.................................................................. 8.9 2.0 3.0 1.5 1.2 1.2

3.................................................................. 3.0 0.4 0.8 0.6 0.9 0.4

4.................................................................. 1.3 Q 0.6 0.2 Q Q

5 or More..................................................... 1.1 Q 0.3 Q 0.4 0.3

Number of Lights Turned On

More than 12 Hours per Day............................ 27.0 6.4 7.9 5.2 3.8 3.6

1..................................................................... 14.8 4.0 4.3 2.7 2.1 1.6

2..................................................................... 7.8 2.0 2.3 1.7 1.0 0.8

3..................................................................... 2.0 0.3 0.5 0.4 0.3 0.5

4..................................................................... 1.0 Q 0.3 Q Q 0.3

5 or More........................................................ 1.4 Q 0.5 Q 0.3 0.3

Energy-Efficient Bulbs Used........................ 11.0 2.2 3.6 2.0 1.9 1.2

1.................................................................. 7.0 1.5 2.3 1.2 1.2 0.7

2.................................................................. 2.9 0.6 0.9 0.6 0.5 0.2

3.................................................................. 0.5 QQQQQ

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

5 or More..................................................... 0.3 N QQQQ

Lighting Usage Indicators

4

 Members

5 or More 

Members

Table HC6.13 Lighting Usage Indicators by Number of Household Members, 2005

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

 Million U.S. Housing Units

Energy Information Administration

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

4

 Members

5 or More 

Members

Table HC6.13 Lighting Usage Indicators by Number of Household Members, 2005

Number of Households With --

Housing 

Units 

(millions)

1

 Member

2

 Members

3

 Members

 Million U.S. Housing Units

Outdoor Lights on All Night................................. 25.8 5.1 8.6 4.8 4.2 3.0

1......................................................................... 16.8 3.4 5.9 2.9 2.4 2.2

2......................................................................... 5.6 1.2 1.6 1.1 1.2 0.5

3 or More............................................................ 3.4 0.5 1.1 0.8 0.6 0.3

Gas Outdoor Lights on All Night..................... 1.3 0.4 0.4 Q Q Q

1..................................................................... 0.6 QQQQQ

2..................................................................... 0.7 Q 0.3 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