Fulight LED Filament Bulb - A19 4W Soft White 2700K Medium Base to Replace 40W Incandescent Designed with 4 sapphire based filaments: Most other competitors use only 4 much cheaper glass filaments 360 degree viewing angle The most compact design: Full-glass style without using plastic connector Helps to save $8.7/year energy cost based on a 6hr lighting-on everyday Lifetime &gt;6 Years; 3-Year Warranty