Number of households by heated area (excluding garage)
186 to 232 square metres (2,001 to 2,500 square feet) 232 or more square metres (2,501 or more square feet)
Number of light bulbs using a programmable timer control
One 164,096 A 225,652 M
Two to three 156,087 M 290,022 A
More than three 51,107 M 303,481 M
None 1,690,194 A 2,585,935 A
Don't know U U
Not stated 275,233 M 311,100 M
Number of light bulbs using a motion detector
One 319,893 A 414,983 A
Two to three 230,380 A 617,825 A
More than three 73,629 M 141,422 M
None 1,419,524 A 2,133,094 A
Don't know U 69,384 M
Not stated 306,737 A 405,976 A
Number of light bulbs using a light sensor
One 165,342 M 210,770 M
Two to three 139,145 M 161,361 M
More than three U 61,496 M
None 1,632,173 A 2,632,838 A
Don't know U U
Not stated 396,885 A 655,798 A


Due to rounding, the numbers may not add up and may differ slightly among tables.


The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.


2011 Survey of Household Energy Use