1) 1 hour of bicycling can power a small TV (100 watts) for 2 hours or a large TV (200 watts) for 1 hour. 2) Riding a stationary bike for 1 hour saves 150 watt hours, enough to power a 150-watt light bulb for 1 hour. 3) Riding for 10 hours a day for a year saves over 547 kilowatt hours, enough to power a light bulb for 183 hours.