Million U.S. Housing Units

Total U.S. Housing Units........................................ 111.1 78.1 64.1 4.2 1.8 2.3 5.7

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day......................... 91.8 65.0 54.3 3.3 1.5 1.6 4.4

1........................................................................ 28.6 17.9 14.0 0.9 0.6 0.7 1.7

2........................................................................ 29.5 20.5 17.0 1.1 0.5 0.4 1.5

3........................................................................ 14.7 11.1 9.6 0.6 Q Q 0.6

4........................................................................ 9.3 7.3 6.3 0.4 Q Q 0.4

5 or More........................................................... 9.7 8.2 7.4 0.4 Q Q Q

Energy-Efficient Bulbs Used........................... 31.1 22.9 19.6 1.1 0.5 0.5 1.3

1.................................................................... 14.6 10.1 8.6 0.3 Q Q 0.7

2.................................................................... 9.6 7.3 6.1 0.5 Q Q 0.4

3.................................................................... 3.2 2.5 2.2 QQQQ

4.................................................................... 2.2 1.8 1.7 QQQQ

5 or More....................................................... 1.4 1.1 1.0 Q N N N

Number of Lights Turned On

Between 4 and 12 Hours per Day....................... 73.2 52.3 43.7 2.9 1.3 1.4 3.0

1........................................................................ 23.0 15.0 11.8 1.2 0.5 0.4 1.1

2........................................................................ 24.9 17.2 14.5 0.9 0.3 0.6 0.9

3........................................................................ 12.5 9.8 8.2 0.4 Q Q 0.6

4........................................................................ 6.4 4.8 4.2 0.3 Q Q Q

5 or More........................................................... 6.4 5.6 4.9 QQQQ

Energy-Efficient Bulbs Used........................... 27.9 20.7 17.6 1.1 0.5 0.5 0.9

1.................................................................... 13.6 9.4 8.1 0.5 Q Q 0.4

2.................................................................... 8.9 6.9 5.7 0.4 Q Q 0.3

3.................................................................... 3.0 2.3 1.9 QQQQ

4.................................................................... 1.3 1.1 1.0 Q N N N

5 or More....................................................... 1.1 1.0 0.9 Q Q N N

Number of Lights Turned On

More than 12 Hours per Day............................... 27.0 18.6 15.1 0.9 0.5 0.8 1.3

1........................................................................ 14.8 9.4 7.5 0.5 0.2 0.4 0.7

2........................................................................ 7.8 5.6 4.5 0.3 Q Q 0.4

3........................................................................ 2.0 1.6 1.4 QQQQ

4........................................................................ 1.0 0.9 0.7 QQQQ

5 or More........................................................... 1.4 1.1 1.0 Q N Q Q

Energy-Efficient Bulbs Used........................... 11.0 8.3 6.8 0.4 Q 0.3 0.5

1.................................................................... 7.0 5.1 4.1 Q Q Q 0.4

2.................................................................... 2.9 2.4 1.9 QQQQ

3.................................................................... 0.5 0.4 0.4 NNNN

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

5 or More....................................................... 0.3 0.2 Q Q N N N

Mobile 

Homes

Table HC3.13 Lighting Usage Indicators by Owner-Occupied Housing Unit Zone, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Lighting Usage Indicators Detached Attached 2 to 4 

Units

5 or More 

Units

Energy Information Administration

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

Mobile 

Homes

Table HC3.13 Lighting Usage Indicators by Owner-Occupied Housing Unit Zone, 2005

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Lighting Usage Indicators Detached Attached 2 to 4 

Units

5 or More 

Units

Outdoor Lights on All Night................................... 25.8 22.3 21.3 1.0 N N N

1............................................................................ 16.8 14.2 13.5 0.7 N N N

2............................................................................ 5.6 4.9 4.7 Q N N N

3 or More.............................................................. 3.4 3.2 3.1 Q N N N

Gas Outdoor Lights on All Night........................ 1.3 1.2 1.1 Q N N N

1........................................................................ 0.6 0.5 0.4 Q N N N

2........................................................................ 0.7 0.7 0.7 NNNN

 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