My grandmother accidentally bought this. Please note that it has been stored by a non-professional. Panasonic 20W 20-type 20-inch Circular Fluorescent Lamp, Natural Color (Daylight Type) Palook FCL20ENW/18F Three-wavelength emission fluorescent lamps successfully concentrate light in the three wavelength ranges of blue (wavelength 450nm), green (wavelength 540nm), and red (wavelength 610nm), where the human eye's color perception (color vision response) is strong, thereby enhancing color rendering properties without sacrificing brightness. Furthermore, light is distributed in areas with high luminous efficiency (the degree to which the human eye perceives brightness), improving brightness and color appearance. Note: Open price products do not have a suggested retail price. Product Name: Palook Fluorescent Lamp Product Name: Palook Fluorescent Lamp, Circular, Starter Type