Table 4.4. Light Usage by Total Number of Rooms, Percent of U.S. Households, 1993

Total Number of Rooms
Housing Unit and Household
Characteristics
Total
1 or 2
3 to 5
6 to 8
9 or
More
RSE Column Factors:
0.5
2.6
0.7
0.7
1.6
RSE
Row
Factor
Total.......................................................
100.0
100.0
100.0
100.0
100.0
0.0
Indoor Electric Lights
Total Number Lights
1 to 4 Hours
None.................................................
10.0
16.8
10.5
9.4
5.8
11.52
1 .......................................................
22.9
36.5
27.7
17.8
10.7
5.96
2 .......................................................
28.4
29.3
31.4
25.8
21.1
5.33
3 .......................................................
17.4
11.1
16.5
18.7
19.0
7.20
4 .......................................................
9.5
Q
6.7
12.8
13.5
10.03
5 or More ..........................................
11.9
Q
7.1
15.5
29.8
8.94
4 to 12 Hours
None.................................................
13.9
27.4
17.1
10.2
6.3
9.05
1 .......................................................
21.6
33.8
27.4
15.6
8.9
5.94
2 .......................................................
27.4
24.1
28.9
26.6
21.5
4.72
3 .......................................................
17.3
9.8
15.2
20.1
19.0
6.57
4 .......................................................
9.5
Q
6.6
12.7
14.4
7.89
5 or More ..........................................
10.4
Q
4.8
14.8
29.9
7.77
More than 12 Hours per Day
None.................................................
68.7
81.8
71.6
64.8
64.2
2.48
1 .......................................................
17.2
13.6
17.8
17.8
10.3
8.10
2 .......................................................
7.9
Q
6.4
9.5
11.8
9.90
3 .......................................................
3.5
Q
2.5
4.5
5.9
15.29
4 .......................................................
1.5
Q
1.0
2.0
3.7
23.54
5 or More ..........................................
1.2
Q
0.8
1.4
4.2
25.14
Incandescent Lights Used
1 to 4 Hours per Day
None.................................................
15.3
21.1
15.8
14.9
10.2
9.11
1 .......................................................
25.2
40.0
30.0
20.0
13.7
5.28
2 .......................................................
26.2
23.6
28.7
24.0
22.3
5.44
3 .......................................................
15.9
9.5
13.9
18.3
19.0
7.14
4 .......................................................
7.8
Q
5.6
10.5
9.5
11.17
5 or More ..........................................
9.7
Q
5.9
12.3
25.3
10.24
4 to 12 Hours per Day
None.................................................
18.0
31.3
21.1
14.4
9.7
7.64
1 .......................................................
25.4
37.6
30.4
20.1
15.2
5.51
2 .......................................................
26.7
20.0
27.1
27.1
24.3
4.82
3 .......................................................
14.4
6.6
12.5
17.2
15.6
7.61
4 .......................................................
7.7
Q
5.3
10.3
11.4
9.85
5 or More ..........................................
7.8
Q
3.6
10.9
23.7
9.41
More than 12 Hours per Day
None.................................................
72.9
83.9
74.8
70.2
69.7
2.21
1 .......................................................
16.3
13.8
17.1
16.3
11.2
9.24
2 .......................................................
6.6
Q
5.0
8.2
10.9
9.80
3 .......................................................
2.5
Q
1.9
3.1
4.1
19.52
4 .......................................................
1.0
Q
0.7
1.4
Q
29.36
5 or More ..........................................
0.8
Q
0.5
0.9
2.7
29.29
Fluorescent Lights Used
1 to 4 Hours per Day
None.................................................
78.2
86.6
81.0
75.5
69.0
1.76
1 .......................................................
16.6
11.3
15.5
18.0
18.8
7.57
2 .......................................................
3.9
Q
2.7
4.9
8.2
13.62
3 or More ..........................................
1.3
Q
0.7
1.6
4.0
23.96
4 to 12 Hours per Day
None.................................................
77.7
88.3
82.7
72.6
66.8
1.76
1 .......................................................
16.4
9.0
14.2
19.3
18.9
7.70
2 .......................................................
4.4
Q
2.6
6.1
9.2
12.31
3 or More ..........................................
1.5
Q
0.6
2.0
5.2
24.44
More than 12 Hours per Day
None.................................................
91.3
95.7
93.4
89.5
84.2
1.19
1 .......................................................
6.9
Q
5.6
8.4
9.4
12.64
2 .......................................................
1.1
Q
0.6
1.3
4.8
24.39
3 or More ..........................................
0.6
Q
0.4
0.8
Q
38.36
Compact Fluorescent Light
Bulbs Used
Yes.....................................................
8.9
Q
6.2
11.0
17.7
9.30
No.......................................................
91.1
95.2
93.8
89.0
82.3
1.30
Halogen Light Bulbs Used
Yes.....................................................
11.6
6.1
9.4
13.6
19.7
9.47
No.......................................................
88.4
93.9
90.6
86.4
80.3
1.35
Outdoor Lights
Yes (more than one may apply)............................................
65.8
26.6
57.4
76.5
81.1
3.37
Evening Only......................................
26.9
8.2
20.4
34.0
40.5
6.78
All Night..............................................
17.2
8.7
15.4
19.6
19.7
7.63
Automatic Control...............................
18.8
4.6
12.0
25.9
33.5
7.50
High Intensity.....................................
3.3
Q
2.1
4.6
4.8
21.66
All Wattage Less than 150.................
32.6
16.7
33.1
34.1
26.6
7.72
Gas Light1 ..........................................
0.6
Q
Q
0.7
2.6
30.03
No.........................................................
34.2
73.4
42.6
23.5
18.9
5.64

1 Gas includes LPG and natural gas.
Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households were sampled.
Notes: -- To obtain the RSE percentage for any table cell, multiply the corresponding column and row factors. -- Because of rounding, data may not sum to totals. -- See "Glossary" for definition of terms used in this report.
Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A-C, E, and H of the 1993 Residential Energy Consumption Survey. (For specific titles of forms, see Appendix A.)

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