Save on your energy bill with these Utilitech Natural Daylight bulbs. These 13W bulbs will replace your 60W bulbs. Each bulb saves up to $51.00 USD in energy cost over the rated life of 10,000 hours. These light bulbs have 830 lumens for brightness, and their color temperature is 5000 kelvin for a more cool tone effect. The light bulbs come packaged in an 8" x 5" x 2" box with four light bulbs.