Million U.S. Housing Units

Total U.S. Housing Units........................................ 111.1 72.1 7.6 7.8 16.7 6.9

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day......................... 91.8 61.0 6.1 6.3 13.2 5.2

1........................................................................ 28.6 15.9 2.1 2.6 6.0 2.2

2........................................................................ 29.5 19.5 1.8 2.3 4.1 1.8

3........................................................................ 14.7 10.7 1.0 0.7 1.6 0.6

4........................................................................ 9.3 7.0 0.8 0.2 0.9 0.4

5 or More........................................................... 9.7 7.9 0.5 0.4 0.6 Q

Energy-Efficient Bulbs Used........................... 31.1 21.7 1.7 2.1 4.1 1.4

1.................................................................... 14.6 9.7 0.7 1.1 2.4 0.9

2.................................................................... 9.6 6.6 0.7 0.7 1.2 0.4

3.................................................................... 3.2 2.5 Q Q 0.3 Q

4.................................................................... 2.2 1.8 Q Q Q Q

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

Number of Lights Turned On

Between 4 and 12 Hours per Day....................... 73.2 49.2 5.0 4.8 10.6 3.6

1........................................................................ 23.0 13.6 2.1 1.8 4.2 1.4

2........................................................................ 24.9 16.5 1.4 1.6 4.3 1.1

3........................................................................ 12.5 9.1 0.8 0.7 1.3 0.7

4........................................................................ 6.4 4.7 0.4 0.4 0.6 0.2

5 or More........................................................... 6.4 5.3 0.3 0.3 0.3 Q

Energy-Efficient Bulbs Used........................... 27.9 19.6 1.8 1.7 3.7 1.1

1.................................................................... 13.6 9.2 0.8 0.9 2.2 0.5

2.................................................................... 8.9 6.1 0.6 0.6 1.1 0.5

3.................................................................... 3.0 2.2 0.3 Q 0.2 Q

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

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

Number of Lights Turned On

More than 12 Hours per Day............................... 27.0 17.1 1.8 1.8 4.8 1.4

1........................................................................ 14.8 8.6 1.0 1.0 3.2 0.9

2........................................................................ 7.8 5.1 0.6 0.5 1.3 0.4

3........................................................................ 2.0 1.6 Q Q Q Q

4........................................................................ 1.0 0.7 Q Q Q Q

5 or More........................................................... 1.4 1.1 Q Q Q Q

Energy-Efficient Bulbs Used........................... 11.0 7.5 0.6 0.6 1.6 0.6

1.................................................................... 7.0 4.6 0.3 0.4 1.1 0.5

2.................................................................... 2.9 2.0 Q Q 0.4 Q

3.................................................................... 0.5 0.4 N N Q N

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

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

Type of Housing Unit

Lighting Usage Indicators Detached Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Table HC2.13 Lighting Usage Indicators by Type of Housing Unit, 2005

Housing 

Units 

(millions)

Single-Family Units Apartments in Buildings 

With--

Energy Information Administration

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

Type of Housing Unit

Lighting Usage Indicators Detached Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Table HC2.13 Lighting Usage Indicators by Type of Housing Unit, 2005

Housing 

Units 

(millions)

Single-Family Units Apartments in Buildings 

With--

Outdoor Lights on All Night................................... 25.8 23.9 1.8 Q N N

1............................................................................ 16.8 15.4 1.4 N N N

2............................................................................ 5.6 5.2 0.3 Q N N

3 or More.............................................................. 3.4 3.3 Q N N N

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

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

2........................................................................ 0.7 0.7 N N N N

 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
 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
 Million U.S. Housing Units

Total U.S. Housing Units........................................ 111.1 33.0 8.0 3.4 5.9 14.4 1.2

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day......................... 91.8 26.8 6.7 2.8 4.8 11.7 0.9

1........................................................................ 28.6 10.7 1.9 1.2 2.0 5.2 0.4

2........................................................................ 29.5 9.0 2.4 0.7 1.8 3.7 0.3

3........................................................................ 14.7 3.6 1.1 0.4 0.5 1.5 Q

4........................................................................ 9.3 2.0 0.7 0.3 Q 0.7 Q

5 or More........................................................... 9.7 1.5 0.5 Q 0.3 0.5 N

Energy-Efficient Bulbs Used........................... 31.1 8.2 2.1 0.7 1.6 3.6 Q

1.................................................................... 14.6 4.5 1.1 0.3 0.8 2.1 Q

2.................................................................... 9.6 2.3 0.5 0.2 0.5 0.9 Q

3.................................................................... 3.2 0.7 0.3 QQQQ

4.................................................................... 2.2 0.4 QQQQN

5 or More....................................................... 1.4 0.4 Q N Q Q N

Number of Lights Turned On

Between 4 and 12 Hours per Day....................... 73.2 20.9 5.5 2.1 3.5 9.2 0.6

1........................................................................ 23.0 8.0 1.8 0.9 1.2 3.8 0.3

2........................................................................ 24.9 7.7 1.9 0.5 1.3 3.7 0.2

3........................................................................ 12.5 2.8 0.9 0.4 0.4 1.1 Q

4........................................................................ 6.4 1.6 0.5 Q 0.4 0.5 Q

5 or More........................................................... 6.4 0.8 0.3 QQQQ

Energy-Efficient Bulbs Used........................... 27.9 7.3 2.0 0.7 1.2 3.1 Q

1.................................................................... 13.6 4.2 1.2 0.3 0.7 1.9 Q

2.................................................................... 8.9 2.1 0.5 Q 0.4 0.9 Q

3.................................................................... 3.0 0.7 0.3 Q Q Q N

4.................................................................... 1.3 QQQQQN

5 or More....................................................... 1.1 Q N N Q Q N

Number of Lights Turned On

More than 12 Hours per Day............................... 27.0 8.4 2.0 0.9 1.3 4.1 Q

1........................................................................ 14.8 5.4 1.1 0.6 0.8 2.8 Q

2........................................................................ 7.8 2.2 0.5 0.3 0.4 1.0 N

3........................................................................ 2.0 0.4 QQQQN

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

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

Energy-Efficient Bulbs Used........................... 11.0 2.6 0.7 Q 0.4 1.3 Q

1.................................................................... 7.0 1.9 0.5 Q 0.2 0.9 Q

2.................................................................... 2.9 0.6 Q Q Q 0.3 N

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

4.................................................................... 0.3 NNNNNN

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

Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.13 Lighting Usage Indicators by Renter-Occupied Housing Unit Zone, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Lighting Usage Indicators Detached

Energy Information Administration

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

Attached 2 to 4 

Units

5 or More 

Units

Mobile 

Homes

Table HC4.13 Lighting Usage Indicators by Renter-Occupied Housing Unit Zone, 2005

 RenterOccupied 

Housing 

Units 

(millions)

Type of Renter-Occupied Housing Unit

U.S.

Housing 

Units 

(millions

Single-Family Units Apartments in 

Buildings With--

Lighting Usage Indicators Detached

Outdoor Lights on All Night................................... 25.8 3.4 2.5 0.8 Q N N

1............................................................................ 16.8 2.6 1.9 0.7 N N N

2............................................................................ 5.6 0.6 0.5 Q Q N N

3 or More.............................................................. 3.4 Q Q Q N N N

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

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

2........................................................................ 0.7 Q Q 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
 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
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
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
Total U.S. Housing Units.......................................... 111.1 47.1 19.0 22.7 22.3

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 38.6 15.3 19.5 18.3

1.......................................................................... 28.6 14.3 4.6 4.8 5.0

2.......................................................................... 29.5 12.1 4.9 6.2 6.3

3.......................................................................... 14.7 5.7 2.6 3.4 2.9

4.......................................................................... 9.3 3.3 1.5 2.2 2.3

5 or More............................................................. 9.7 3.3 1.7 2.9 1.8

Energy-Efficient Bulbs Used............................. 31.1 13.6 5.1 6.8 5.5

1....................................................................... 14.6 6.4 2.6 2.9 2.7

2....................................................................... 9.6 4.4 1.3 2.3 1.6

3....................................................................... 3.2 1.5 0.6 0.6 0.4

4....................................................................... 2.2 0.7 0.4 0.5 0.6

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

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 30.7 12.8 15.6 14.1

1.......................................................................... 23.0 10.7 4.0 4.2 4.0

2.......................................................................... 24.9 10.6 4.6 5.1 4.5

3.......................................................................... 12.5 5.0 1.9 2.8 2.8

4.......................................................................... 6.4 2.5 1.1 1.3 1.4

5 or More............................................................. 6.4 1.9 1.1 2.2 1.3

Energy-Efficient Bulbs Used............................. 27.9 11.9 4.8 6.0 5.3

1....................................................................... 13.6 6.1 2.2 2.8 2.5

2....................................................................... 8.9 3.6 1.6 1.9 1.8

3....................................................................... 3.0 1.2 0.6 0.6 0.7

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

5 or More.......................................................... 1.1 0.5 0.2 0.3 Q

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 11.9 4.6 5.3 5.1

1.......................................................................... 14.8 6.9 2.4 2.8 2.7

2.......................................................................... 7.8 3.3 1.5 1.5 1.5

3.......................................................................... 2.0 1.0 0.3 Q 0.4

4.......................................................................... 1.0 0.3 Q 0.5 Q

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

Energy-Efficient Bulbs Used............................. 11.0 4.8 1.8 2.1 2.3

1....................................................................... 7.0 3.0 1.2 1.4 1.4

2....................................................................... 2.9 1.4 0.4 0.4 0.7

3....................................................................... 0.5 QQQQ

4....................................................................... 0.3 QQQQ

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

Housing

Units 

Lighting Usage Indicators (millions)

Urban/Rural Location

(as Self-Reported)

City Town

Table HC8.13 Lighting Usage Indicators by Urban/Rural Location, 2005

 Million U.S. Housing Units

Surburbs Rural

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
Housing

Units 

Lighting Usage Indicators (millions)

Urban/Rural Location

(as Self-Reported)

City Town

Table HC8.13 Lighting Usage Indicators by Urban/Rural Location, 2005

 Million U.S. Housing Units

Surburbs Rural

Outdoor Lights on All Night..................................... 25.8 9.0 3.5 6.6 6.7

1.............................................................................. 16.8 5.6 2.2 4.1 4.9

2.............................................................................. 5.6 2.3 0.8 1.3 1.2

3 or More................................................................. 3.4 1.1 0.4 1.2 0.6

Gas Outdoor Lights on All Night.......................... 1.3 0.3 0.2 0.5 Q

1.......................................................................... 0.6 Q Q 0.4 Q

2.......................................................................... 0.7 QQQQ

 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
 Million U.S. Housing Units

Total......................................................................... 111.1 10.9 26.1 27.3 24.0 22.8

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day......................... 91.8 8.2 22.3 23.1 19.7 18.4

1........................................................................ 28.6 2.3 7.1 6.7 6.4 6.2

2........................................................................ 29.5 2.6 6.9 7.7 6.6 5.7

3........................................................................ 14.7 1.3 4.1 3.4 2.9 3.0

4........................................................................ 9.3 1.0 2.4 2.2 2.1 1.8

5 or More........................................................... 9.7 1.0 1.9 3.2 1.8 1.8

Energy-Efficient Bulbs Used........................... 31.1 2.5 7.1 7.0 8.1 6.4

1.................................................................... 14.6 1.1 3.2 3.3 3.8 3.3

2.................................................................... 9.6 0.8 2.2 2.3 2.7 1.7

3.................................................................... 3.2 0.2 0.9 0.6 0.8 0.6

4.................................................................... 2.2 0.2 0.6 0.4 0.6 0.4

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

Number of Lights Turned On

Between 4 and 12 Hours per Day....................... 73.2 6.5 17.7 19.2 15.5 14.3

1........................................................................ 23.0 1.9 5.6 5.9 4.8 4.7

2........................................................................ 24.9 2.3 6.1 6.5 4.9 5.0

3........................................................................ 12.5 1.0 3.2 3.4 2.9 2.1

4........................................................................ 6.4 0.8 1.3 1.7 1.3 1.2

5 or More........................................................... 6.4 0.5 1.5 1.6 1.6 1.3

Energy-Efficient Bulbs Used........................... 27.9 2.4 6.8 6.1 7.3 5.4

1.................................................................... 13.6 1.1 3.1 2.8 3.8 2.8

2.................................................................... 8.9 0.9 2.5 2.1 1.9 1.5

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

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

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

Number of Lights Turned On

More than 12 Hours per Day............................... 27.0 1.6 6.2 6.9 6.1 6.2

1........................................................................ 14.8 0.8 3.3 3.6 3.6 3.4

2........................................................................ 7.8 0.5 1.7 2.2 1.5 1.8

3........................................................................ 2.0 Q 0.5 0.5 0.5 0.4

4........................................................................ 1.0 Q 0.3 0.3 0.2 Q

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

Energy-Efficient Bulbs Used........................... 11.0 0.7 2.4 2.3 3.0 2.6

1.................................................................... 7.0 0.5 1.4 1.4 2.1 1.6

2.................................................................... 2.9 Q 0.7 0.7 0.7 0.7

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

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

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

Less than 

4,000 HDD

Housing 

Units 

(millions)

Climate Zone1

Table HC9.13 Lighting Usage Indicators by Climate Zone, 2005

Lighting Usage Indicators

2,000 CDD 

or More

and Less 

than 4,000 

HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Energy Information Administration

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

Less than 

4,000 HDD

Housing 

Units 

(millions)

Climate Zone1

Table HC9.13 Lighting Usage Indicators by Climate Zone, 2005

Lighting Usage Indicators

2,000 CDD 

or More

and Less 

than 4,000 

HDD

Less than 2,000 CDD and --

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

4,000 to 

5,499 HDD

Outdoor Lights on All Night................................... 25.8 2.1 5.5 6.6 5.3 6.2

1............................................................................ 16.8 1.4 3.6 4.2 3.6 3.9

2............................................................................ 5.6 0.4 1.1 1.7 0.9 1.5

3 or More.............................................................. 3.4 0.3 0.8 0.8 0.7 0.8

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

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

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

 1. One of five climatically distinct areas, determined according to the 30-year average (1971-2000) of the annual heating and cooling 

degree-days. A household is assigned to a climate zone according to the 30-year average annual degree-days for an appropriate nearby 

weather station.

 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
Total U.S. Housing Units.......................................... 111.1 20.6 25.6 40.7 24.2

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 16.8 21.7 33.8 19.5

1.......................................................................... 28.6 5.0 6.3 11.2 6.1

2.......................................................................... 29.5 6.2 6.5 10.5 6.3

3.......................................................................... 14.7 2.5 4.0 5.0 3.1

4.......................................................................... 9.3 1.5 2.5 3.4 1.9

5 or More............................................................. 9.7 1.6 2.4 3.7 2.0

Energy-Efficient Bulbs Used............................. 31.1 5.2 6.7 10.6 8.6

1....................................................................... 14.6 2.3 3.1 5.6 3.6

2....................................................................... 9.6 1.7 2.0 2.9 3.1

3....................................................................... 3.2 0.6 0.7 0.9 1.0

4....................................................................... 2.2 0.4 0.6 0.7 0.5

5 or More.......................................................... 1.4 0.2 0.4 0.4 0.4

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 13.9 17.6 27.2 14.4

1.......................................................................... 23.0 4.4 5.4 9.2 4.0

2.......................................................................... 24.9 5.2 6.1 8.7 5.0

3.......................................................................... 12.5 2.3 2.9 4.7 2.6

4.......................................................................... 6.4 0.9 1.7 2.3 1.4

5 or More............................................................. 6.4 1.1 1.5 2.3 1.4

Energy-Efficient Bulbs Used............................. 27.9 4.7 6.8 9.5 6.9

1....................................................................... 13.6 2.2 3.2 4.8 3.4

2....................................................................... 8.9 1.8 2.3 2.7 2.1

3....................................................................... 3.0 0.4 0.6 1.1 0.8

4....................................................................... 1.3 Q 0.4 0.5 0.3

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

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 5.7 5.5 11.7 4.1

1.......................................................................... 14.8 3.1 2.9 6.5 2.3

2.......................................................................... 7.8 1.7 1.7 3.3 1.1

3.......................................................................... 2.0 0.4 0.4 0.9 0.3

4.......................................................................... 1.0 0.2 Q 0.4 Q

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

Energy-Efficient Bulbs Used............................. 11.0 2.0 2.3 4.4 2.2

1....................................................................... 7.0 1.2 1.4 2.8 1.6

2....................................................................... 2.9 0.7 0.6 1.1 0.5

3....................................................................... 0.5 QQQQ

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

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

Lighting Usage Indicators

U.S. Census Region

Northeast Midwest

Table HC10.13 Lighting Usage Indicators by U.S. Census Region, 2005

 Million U.S. Housing Units

South West

Housing

Units 

(millions)

Energy Information Administration

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

U.S. Census Region

Northeast Midwest

Table HC10.13 Lighting Usage Indicators by U.S. Census Region, 2005

 Million U.S. Housing Units

South West

Housing

Units 

(millions)

Outdoor Lights on All Night..................................... 25.8 2.7 7.1 10.1 5.7

1.............................................................................. 16.8 1.7 5.0 6.6 3.5

2.............................................................................. 5.6 0.7 1.3 2.3 1.3

3 or More................................................................. 3.4 0.4 0.9 1.2 1.0

Gas Outdoor Lights on All Night.......................... 1.3 Q 0.3 0.6 Q

1.......................................................................... 0.6 QQQQ

2.......................................................................... 0.7 Q Q 0.3 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
Total U.S. Housing Units.......................................... 111.1 20.6 15.1 5.5

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 16.8 12.2 4.6

1.......................................................................... 28.6 5.0 3.5 1.5

2.......................................................................... 29.5 6.2 4.8 1.4

3.......................................................................... 14.7 2.5 1.7 0.8

4.......................................................................... 9.3 1.5 1.1 0.4

5 or More............................................................. 9.7 1.6 1.1 0.5

Energy-Efficient Bulbs Used............................. 31.1 5.2 3.6 1.6

1....................................................................... 14.6 2.3 1.5 0.8

2....................................................................... 9.6 1.7 1.3 0.4

3....................................................................... 3.2 0.6 0.4 0.1

4....................................................................... 2.2 0.4 0.3 Q

5 or More.......................................................... 1.4 0.2 Q Q

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 13.9 10.4 3.5

1.......................................................................... 23.0 4.4 3.1 1.3

2.......................................................................... 24.9 5.2 4.2 1.0

3.......................................................................... 12.5 2.3 1.7 0.6

4.......................................................................... 6.4 0.9 0.6 0.3

5 or More............................................................. 6.4 1.1 0.8 0.3

Energy-Efficient Bulbs Used............................. 27.9 4.7 3.3 1.4

1....................................................................... 13.6 2.2 1.5 0.6

2....................................................................... 8.9 1.8 1.3 0.4

3....................................................................... 3.0 0.4 Q 0.2

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

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

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 5.7 4.4 1.2

1.......................................................................... 14.8 3.1 2.5 0.6

2.......................................................................... 7.8 1.7 1.3 0.4

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

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

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

Energy-Efficient Bulbs Used............................. 11.0 2.0 1.5 0.5

1....................................................................... 7.0 1.2 0.9 0.2

2....................................................................... 2.9 0.7 0.5 0.2

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

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

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

Lighting Usage Indicators Middle Atlantic

Table HC11.13 Lighting Usage Indicators by Northeast Census Region, 2005

 Million U.S. Housing Units

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast New England

Energy Information Administration

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

Table HC11.13 Lighting Usage Indicators by Northeast Census Region, 2005

 Million U.S. Housing Units

Northeast Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Northeast New England

Outdoor Lights on All Night..................................... 25.8 2.7 2.2 0.6

1.............................................................................. 16.8 1.7 1.4 0.3

2.............................................................................. 5.6 0.7 0.6 Q

3 or More................................................................. 3.4 0.4 0.3 Q

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

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

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
Total U.S. Housing Units.......................................... 111.1 25.6 17.7 7.9

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 21.7 14.5 7.2

1.......................................................................... 28.6 6.3 4.4 1.9

2.......................................................................... 29.5 6.5 4.2 2.3

3.......................................................................... 14.7 4.0 2.8 1.2

4.......................................................................... 9.3 2.5 1.5 1.0

5 or More............................................................. 9.7 2.4 1.6 0.8

Energy-Efficient Bulbs Used............................. 31.1 6.7 4.7 2.0

1....................................................................... 14.6 3.1 2.1 1.0

2....................................................................... 9.6 2.0 1.4 0.6

3....................................................................... 3.2 0.7 0.5 Q

4....................................................................... 2.2 0.6 0.5 Q

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

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 17.6 12.4 5.2

1.......................................................................... 23.0 5.4 3.7 1.7

2.......................................................................... 24.9 6.1 4.5 1.6

3.......................................................................... 12.5 2.9 2.2 0.7

4.......................................................................... 6.4 1.7 1.0 0.8

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

Energy-Efficient Bulbs Used............................. 27.9 6.8 5.0 1.8

1....................................................................... 13.6 3.2 2.4 0.9

2....................................................................... 8.9 2.3 1.6 0.6

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

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

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

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 5.5 3.5 1.9

1.......................................................................... 14.8 2.9 1.9 0.9

2.......................................................................... 7.8 1.7 1.0 0.7

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

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

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

Energy-Efficient Bulbs Used............................. 11.0 2.3 1.5 0.8

1....................................................................... 7.0 1.4 1.0 0.4

2....................................................................... 2.9 0.6 0.3 0.3

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

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

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

Lighting Usage Indicators East North Central

Table HC12.13 Lighting Usage Indicators by Midwest Census Region, 2005

 Million U.S. Housing Units

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest West North Central

Energy Information Administration

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

Table HC12.13 Lighting Usage Indicators by Midwest Census Region, 2005

 Million U.S. Housing Units

Midwest Census Region

U.S.

Housing

Units

(millions)

Census Division

Total

Midwest West North Central

Outdoor Lights on All Night..................................... 25.8 7.1 5.2 1.9

1.............................................................................. 16.8 5.0 3.6 1.3

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

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

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

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

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
Total U.S. Housing Units.......................................... 111.1 40.7 21.7 6.9 12.1

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 33.8 17.5 6.1 10.3

1.......................................................................... 28.6 11.2 6.5 1.5 3.2

2.......................................................................... 29.5 10.5 5.4 2.0 3.1

3.......................................................................... 14.7 5.0 2.1 1.2 1.7

4.......................................................................... 9.3 3.4 1.5 0.8 1.2

5 or More............................................................. 9.7 3.7 1.9 0.6 1.2

Energy-Efficient Bulbs Used............................. 31.1 10.6 5.5 1.4 3.8

1....................................................................... 14.6 5.6 2.8 0.9 1.9

2....................................................................... 9.6 2.9 1.7 0.3 0.9

3....................................................................... 3.2 0.9 0.4 Q 0.4

4....................................................................... 2.2 0.7 0.4 Q Q

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

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 27.2 14.4 5.0 7.8

1.......................................................................... 23.0 9.2 5.3 1.3 2.6

2.......................................................................... 24.9 8.7 4.6 1.5 2.7

3.......................................................................... 12.5 4.7 2.5 1.0 1.2

4.......................................................................... 6.4 2.3 1.2 0.6 0.5

5 or More............................................................. 6.4 2.3 0.9 0.6 0.9

Energy-Efficient Bulbs Used............................. 27.9 9.5 5.0 1.2 3.3

1....................................................................... 13.6 4.8 2.4 0.7 1.6

2....................................................................... 8.9 2.7 1.5 0.2 0.9

3....................................................................... 3.0 1.1 0.6 0.2 0.3

4....................................................................... 1.3 0.5 0.3 Q Q

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

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 11.7 6.2 2.2 3.3

1.......................................................................... 14.8 6.5 3.5 1.1 1.9

2.......................................................................... 7.8 3.3 1.7 0.7 0.9

3.......................................................................... 2.0 0.9 0.5 Q Q

4.......................................................................... 1.0 0.4 Q Q Q

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

Energy-Efficient Bulbs Used............................. 11.0 4.4 2.3 0.6 1.5

1....................................................................... 7.0 2.8 1.6 0.3 0.9

2....................................................................... 2.9 1.1 0.5 0.3 0.4

3....................................................................... 0.5 QQQQ

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

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

Table HC13.13 Lighting Usage Indicators by South Census Region, 2005

 Million U.S. Housing Units

East South 

Central

West South 

Central

South Census Region

Lighting Usage Indicators South Atlantic

U.S.

Housing

Units

(millions)

Census Division

Total 

South

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
Table HC13.13 Lighting Usage Indicators by South Census Region, 2005

 Million U.S. Housing Units

East South 

Central

West South 

Central

South Census Region

Lighting Usage Indicators South Atlantic

U.S.

Housing

Units

(millions)

Census Division

Total 

South

Outdoor Lights on All Night..................................... 25.8 10.1 5.2 1.7 3.2

1.............................................................................. 16.8 6.6 3.4 1.0 2.2

2.............................................................................. 5.6 2.3 1.0 0.5 0.8

3 or More................................................................. 3.4 1.2 0.8 Q Q

Gas Outdoor Lights on All Night.......................... 1.3 0.6 Q Q Q

1.......................................................................... 0.6 QQQQ

2.......................................................................... 0.7 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
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
Total U.S. Housing Units.......................................... 111.1 7.1 7.0 8.0 12.1

Indoor Lights Turned On During Summer

Number of Lights Turned On

Between 1 and 4 Hours per Day........................... 91.8 5.5 5.5 6.7 9.5

1.......................................................................... 28.6 1.8 2.0 2.3 2.8

2.......................................................................... 29.5 2.3 1.9 2.0 3.4

3.......................................................................... 14.7 0.7 0.8 0.9 1.4

4.......................................................................... 9.3 0.4 Q 0.8 1.1

5 or More............................................................. 9.7 0.4 0.4 0.8 0.9

Energy-Efficient Bulbs Used............................. 31.1 1.7 1.7 2.1 4.7

1....................................................................... 14.6 0.7 0.7 1.3 1.9

2....................................................................... 9.6 0.7 0.6 0.4 1.8

3....................................................................... 3.2 Q Q Q 0.5

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

5 or More.......................................................... 1.4 QQQQ

Number of Lights Turned On

Between 4 and 12 Hours per Day......................... 73.2 4.3 4.2 5.0 7.1

1.......................................................................... 23.0 1.2 1.8 1.5 2.0

2.......................................................................... 24.9 1.9 1.4 1.8 2.3

3.......................................................................... 12.5 0.8 0.5 0.7 1.2

4.......................................................................... 6.4 Q Q 0.3 0.8

5 or More............................................................. 6.4 0.3 Q 0.6 0.9

Energy-Efficient Bulbs Used............................. 27.9 1.6 1.2 1.9 4.0

1....................................................................... 13.6 0.6 0.5 0.9 2.1

2....................................................................... 8.9 0.7 0.4 0.6 1.1

3....................................................................... 3.0 Q Q Q 0.4

4....................................................................... 1.3 N Q Q Q

5 or More.......................................................... 1.1 QQQQ

Number of Lights Turned On

More than 12 Hours per Day................................. 27.0 2.1 2.0 2.3 2.4

1.......................................................................... 14.8 1.3 1.1 1.3 1.4

2.......................................................................... 7.8 0.6 0.7 0.6 0.5

3.......................................................................... 2.0 QQQQ

4.......................................................................... 1.0 QQQQ

5 or More............................................................. 1.4 QQQQ

Energy-Efficient Bulbs Used............................. 11.0 0.8 0.7 1.0 1.5

1....................................................................... 7.0 0.4 0.4 0.6 1.0

2....................................................................... 2.9 Q Q Q 0.3

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

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

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

Table HC15.13 Lighting Usage Indicators by Four Most Populated States, 2005

 Million U.S. Housing Units

South West

Housing

Units 

Lighting Usage Indicators (millions)

U.S. Census Region

Northeast Midwest

Energy Information Administration

2005 Residential Consumption Survey: Preliminary Housing Characteristics Tables
Table HC15.13 Lighting Usage Indicators by Four Most Populated States, 2005

 Million U.S. Housing Units

South West

Housing

Units 

Lighting Usage Indicators (millions)

U.S. Census Region

Northeast Midwest

Outdoor Lights on All Night..................................... 25.8 0.6 1.7 2.2 2.6

1.............................................................................. 16.8 0.4 1.0 1.4 1.6

2.............................................................................. 5.6 Q Q 0.6 0.6

3 or More................................................................. 3.4 N 0.4 Q 0.5

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

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

2.......................................................................... 0.7 QQQQ

 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