The Light Bulb Pack contains 12 3000k LED bulbs with a supply voltage of 120 V and frequency of 60 Hz. Having the brightness of a traditional 60 W bulb, they consume only 15 percent of energy thus easily saving power costs. The bulbs offer a lifespan of up to 15,000 hours. They are mercury free and compatible with existing regular fixtures so they can simply being screwed in. The bulbs give a glare-free soft white light and can illuminate any room in the household with a simple flip of the switch.