Table 4.3. Light Usage by Total Number of Rooms, Million U.S. Households, 1993

		Total Number of Rooms (excluding bathrooms)
Housing Unit and Household Characteristics	Total	1 or 2	3 to 5	6 to 8	9 or More	RSE Row Factors
RSE Column Factors:	0.4	2.9	0.7	0.7	1.7
Total.......................................................	96.6	3.2	47.4	40.2	5.8	3.59
Indoor Electric Lights Total Number Lights 1 to 4 Hours
None.................................................	9.6	0.5	5.0	3.8	0.3	11.81
1 .......................................................	22.1	1.2	13.1	7.2	0.6	6.84
2 .......................................................	27.4	0.9	14.9	10.4	1.2	6.27
3 .......................................................	16.8	0.4	7.8	7.5	1.1	7.77
4 .......................................................	9.2	Q	3.2	5.1	0.8	10.88
5 or More ..........................................	11.5	Q	3.4	6.2	1.7	10.07
4 to 12 Hours
None.................................................	13.4	0.9	8.1	4.1	0.4	9.79
1 .......................................................	20.8	1.1	13.0	6.3	0.5	6.33
2 .......................................................	26.4	0.8	13.7	10.7	1.3	6.04
3 .......................................................	16.7	0.3	7.2	8.1	1.1	7.33
4 .......................................................	9.2	Q	3.1	5.1	0.8	8.41
5 or More ..........................................	10.0	Q	2.3	6.0	1.7	8.84
More than 12 Hours per Day
None.................................................	66.4	2.6	33.9	26.1	3.7	4.04
1 .......................................................	16.6	0.4	8.4	7.1	0.6	8.52
2 .......................................................	7.6	Q	3.0	3.8	0.7	10.83
3 .......................................................	3.3	Q	1.2	1.8	0.3	16.40
4 .......................................................	1.5	Q	0.5	0.8	0.2	24.08
5 or More ..........................................	1.2	Q	0.4	0.6	0.2	26.11
Incandescent Lights Used 1 to 4 Hours per Day
None.................................................	14.8	0.7	7.5	6.0	0.6	9.54
1 .......................................................	24.4	1.3	14.2	8.0	0.8	6.26
2 .......................................................	25.3	0.8	13.6	9.6	1.3	6.16
3 .......................................................	15.3	0.3	6.6	7.4	1.1	8.16
4 .......................................................	7.5	Q	2.6	4.2	0.6	11.81
5 or More ..........................................	9.4	Q	2.8	5.0	1.5	11.42
4 to 12 Hours per Day
None.................................................	17.4	1.0	10.0	5.8	0.6	8.31
1 .......................................................	24.5	1.2	14.4	8.1	0.9	6.16
2 .......................................................	25.8	0.6	12.9	10.9	1.4	6.04
3 .......................................................	13.9	0.2	5.9	6.9	0.9	8.20
4 .......................................................	7.4	Q	2.5	4.1	0.7	10.55
5 or More ..........................................	7.5	Q	1.7	4.4	1.4	10.46
More than 12 Hours per Day
None.................................................	70.4	2.7	35.5	28.2	4.1	3.81
1 .......................................................	15.7	0.4	8.1	6.5	0.7	9.53
2 .......................................................	6.3	Q	2.4	3.3	0.6	10.68
3 .......................................................	2.4	Q	0.9	1.2	0.2	20.55
4 .......................................................	1.0	Q	0.3	0.6	Q	31.05
5 or More ..........................................	0.8	Q	0.2	0.4	0.2	30.23
Fluorescent Lights Used 1 to 4 Hours per Day
None.................................................	75.5	2.8	38.4	30.3	4.0	4.01
1 .......................................................	16.1	0.4	7.4	7.3	1.1	8.29
2 .......................................................	3.8	Q	1.3	2.0	0.5	14.15
3 or More ..........................................	1.2	Q	0.3	0.6	0.2	24.63
4 to 12 Hours per Day
None.................................................	75.1	2.8	39.2	29.2	3.9	4.01
1 .......................................................	15.9	0.3	6.7	7.8	1.1	8.50
2 .......................................................	4.3	Q	1.2	2.5	0.5	12.88
3 or More ..........................................	1.4	Q	0.3	0.8	0.3	25.13
More than 12 Hours per Day
None.................................................	88.2	3.1	44.3	36.0	4.9	3.76
1 .......................................................	6.7	Q	2.7	3.4	0.6	13.55
2 .......................................................	1.1	Q	0.3	0.5	0.3	25.05
3 or More ..........................................	0.6	Q	0.2	0.3	Q	40.52
Compact Fluorescent Light Bulbs Used
Yes.....................................................	8.6	0.2	3.0	4.4	1.0	11.13
No.......................................................	88.1	3.1	44.4	35.8	4.8	3.85
Halogen Light Bulbs Used
Yes.....................................................	11.2	0.2	4.4	5.5	1.2	9.64
No.......................................................	85.4	3.0	42.9	34.7	4.7	3.95
Outdoor Lights
Yes (more than one may apply)............................................	63.5	0.9	27.2	30.8	4.7	4.98
Evening Only......................................	25.9	0.3	9.6	13.7	2.4	7.86
All Night..............................................	16.6	0.3	7.3	7.9	1.2	8.53
Automatic Control...............................	18.2	0.1	5.7	10.4	2.0	8.05
High Intensity.....................................	3.2	Q	1.0	1.8	0.3	22.64
All Wattage Less than 150.................	31.5	0.5	15.7	13.7	1.6	8.51
Gas Light1 ..........................................	0.5	Q	Q	0.3	0.2	31.23
No.........................................................	33.1	2.4	20.2	9.4	1.1	6.84

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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