AMLEDTEK A-BF401 LED Filament A19 4W to Replace 40W Incandescent Bulb Softwhite (2700K) AMLEDTEK 4-Watt Filament-Style replaces your standard 40-Watt A19, saving you up to $80.70 in energy costs Warm light just as traditional bulb. Instant on. New filament bulb design is ideal for use in all general purpose lighting Extra long lifetime of 22.8 years - reduces the hassle of frequent replacement Safe for the environment and your home - durable design and mercury-free