Switch off just one thing and turn on to a cleaner lifestyle Householders, tenants and businesses, large and small, across the nation are being urged to turn off something electrical on Tuesday April 4 2006, National "Come off it" Day. It could be the standby light on the TV, or a single light bulb. Anything and everything that isn’t needed but which might normally remain on. At the same time people are being encouraged to "plug in" at least one new energy-saving, long life light bulb on the day. emissions per year.