SunBlaster Compact Fluorescent Bulbs fit directly into a standard light socket. High output compact fluorescent lamps with low energy built-in, self-ballasted fixtures. They produce up to 90% more light, and last up to 10 times longer than regular incandescent bulbs – up to 10,000 hours, while using much less electricity. These bulbs are rated at full spectrum 64000K output. Use these grow light light bulbs indoors for starting seedlings, for stimulating growth in houseplants, or simply for lighting a room with energy efficient CF bulbs. Save money with energy efficient indoor lighting. SunBlaster Compact Fluorescent Bulbs are the indoor gardener’s best friend.