Measuring Light in Lumens
The new efficiency standards require light bulbs to consume less electricity (watts) for the amount of light produced (lumens). More traditional inefficient 100 watt (W) bulbs—typically incandescent bulbs—will give way to choices including newer incandescent bulbs—that use only 72 watts or less to provide you a comparable amount of light (lumens). If you are replacing a 100W bulb, a good rule of thumb is to look for a bulb that gives you about 1600 lumens. Your new bulb should provide that level of brightness for no more than 72W, cutting your energy bill.
As of January 1, 2012, traditional, inefficient 100W incandescent light bulbs will not meet the standards and will no longer be available at most stores.* However, you will have many other options that will save you money. Many of these choices are already on store shelves.
Similar standards will phase in for other types of light bulbs over the next three years. Traditional 75 watt incandescent light bulbs will no longer be available as of January 1, 2013. Traditional 40 and 60 watt incandescent light bulbs will no longer be available as of January 1, 2014.