This is NOT a light bulb.  A cordless and rechargeable light with an E40 fitting.
Unique spiral shape design within a classic Edison bulb style (this does not fit into a standard lamp fitting) It can sit into a bottle neck approx. 42mm diameter. 
Emits a warm yellow light, creating a cosy and inviting atmosphere.
Suitable for various home decor styles, including bedside light or night light for kids, offering a soothing glow that helps create a relaxing bedtime atmosphere.  Simply plug in via USB to recharge and enjoy cordless convenience
This cordless rechargeable lamp combines the charm of vintage design with modern functionality, making it a versatile and stylish addition to your home.

Charge with a USB cable, Includes a 50cm USB cable
Offers 3.5 hours of battery life on a 1.5 hour charge