Total U.S. Housing Units........................... 111.1 26.7 28.8 20.6 13.1 22.0 16.6 38.6

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day............ 91.8 20.8 23.6 17.0 11.3 19.1 13.0 30.7

1........................................................... 28.6 9.4 9.1 4.5 2.4 3.2 5.7 12.6

2........................................................... 29.5 6.8 8.0 5.8 3.7 5.2 4.2 10.2

3........................................................... 14.7 2.7 3.1 3.0 2.5 3.4 1.7 4.1

4........................................................... 9.3 1.4 1.8 2.0 1.2 2.9 1.0 2.2

5 or More.............................................. 9.7 0.6 1.7 1.7 1.5 4.3 0.5 1.6

Energy-Efficient Bulbs Used............. 31.1 5.4 7.9 6.5 4.2 7.1 3.7 8.8

1....................................................... 14.6 3.3 4.4 2.8 1.6 2.5 2.2 4.9

2....................................................... 9.6 1.3 2.1 2.3 1.4 2.5 0.9 2.4

3....................................................... 3.2 0.4 0.8 0.5 0.7 0.8 0.3 0.8

4....................................................... 2.2 0.2 0.5 0.5 Q 0.8 Q 0.5

5 or More.......................................... 1.4 Q Q 0.4 0.3 0.5 Q Q

Number of Lights Turned On

Between 4 and 12 Hours per Day.......... 73.2 15.1 18.7 14.1 9.3 16.1 9.6 23.0

1........................................................... 23.0 6.6 6.0 4.6 2.5 3.3 3.8 9.2

2........................................................... 24.9 5.5 6.7 5.0 3.3 4.4 3.5 8.0

3........................................................... 12.5 1.7 3.2 2.3 1.9 3.5 1.2 3.1

4........................................................... 6.4 0.8 1.7 1.2 0.9 1.8 0.5 1.5

5 or More.............................................. 6.4 0.6 1.1 1.0 0.7 3.1 0.6 1.2

Energy-Efficient Bulbs Used............. 27.9 4.3 7.2 5.9 3.6 6.8 3.0 7.6

1....................................................... 13.6 2.5 3.9 2.9 1.7 2.6 1.7 4.2

2....................................................... 8.9 1.4 2.2 1.7 1.2 2.5 0.9 2.3

3....................................................... 3.0 0.2 0.5 0.7 0.6 1.0 Q 0.5

4....................................................... 1.3 Q 0.4 0.3 Q 0.3 Q 0.3

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

Number of Lights Turned On

More than 12 Hours per Day.................. 27.0 6.4 7.0 4.9 2.8 5.9 4.1 9.4

1........................................................... 14.8 3.9 4.1 3.0 1.2 2.5 2.5 5.7

2........................................................... 7.8 1.9 2.0 1.2 1.1 1.8 1.1 2.6

3........................................................... 2.0 0.3 0.5 0.4 0.3 0.4 0.3 0.6

4........................................................... 1.0 Q 0.2 Q Q 0.5 Q 0.2

5 or More.............................................. 1.4 Q Q Q Q 0.7 Q 0.3

Energy-Efficient Bulbs Used............. 11.0 2.0 2.6 2.2 1.5 2.7 1.5 3.1

1....................................................... 7.0 1.4 1.7 1.5 0.8 1.6 1.0 2.1

2....................................................... 2.9 0.5 0.7 0.5 0.5 0.7 0.4 0.8

3....................................................... 0.5 Q Q Q Q QQ Q

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

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

Table HC7.13 Lighting Usage Indicators by Household Income, 2005

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

Lighting Usage Indicators $59,999

$60,000 to 

$79,999

$80,000 or 

More

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
Table HC7.13 Lighting Usage Indicators by Household Income, 2005

Below 

Poverty 

Line

Eligible for 

Federal 

Assistance1

 Million U.S. Housing Units

2005 Household Income

Housing 

Units 

(millions)

Less than 

$20,000

$20,000 to 

$39,999

$40,000 to 

Lighting Usage Indicators $59,999

$60,000 to 

$79,999

$80,000 or 

More

Outdoor Lights on All Night...................... 25.8 4.4 6.3 4.6 4.1 6.3 2.3 7.0

1.............................................................. 16.8 3.1 4.4 3.1 2.8 3.4 1.6 5.0

2.............................................................. 5.6 1.0 1.3 1.1 0.8 1.5 0.5 1.3

3 or More................................................. 3.4 0.3 0.6 0.5 0.5 1.4 Q 0.7

Gas Outdoor Lights on All Night........... 1.3 0.4 0.3 Q Q Q Q 0.5

1........................................................... 0.6 Q Q Q Q Q Q 0.3

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