You’ll love the “instant on” feature from the first flip of your light switch. The LANNA LED household A19 bulb replaces dangerous CFL and energy consuming Incandescent bulbs. We hope you feel good about reducing your carbon footprint and saving money. Our bulbs are manufactured to produce a true warm/soft white light unlike the harsh blue light of our competitors and at a price that is easy on your wallet. LANNA LED light bulbs are rated for 30,000 hours of operation, that’s 20 years if used 4 hours a day. Thank you for choosing LANNA, have a wonderful day.