Abstract: The instant disclosure relates to an LED light bulb, which includes a cap, a glass bulb, an LED module, an optical element, and a power supply module. The glass bulb is disposed on one end of the cap to cooperatively define an accommodating space. The LED module, used for emitting a first light having a first bandwidth, is received inside the accommodating space. To guide the first light, the optical element is received inside the accommodating space and located at a light path of the LED module. The optical element has a light guiding portion and a wavelength transformation portion used for changing the bandwidth of the emitted light from the LED module. The light guiding portion and the wavelength transformation portion are connected seamlessly to each other. The power supply module is disposed inside the cap and electrically connected to the LED module and the cap.

Abstract: The instant disclosure relates to a light bulb, which includes a connecting cap, a heat-dissipating seat, a LED module, a light-guiding member, and a bulb. The heat-dissipating seat is disposed on one end of the connecting cap, and the LED module is disposed on the heat-dissipating seat. The light-guiding member is connected to the heat-dissipating seat and covers the LED module. At least one microstructure is formed on the surface of the light-guiding member for changing the light projection path. The bulb is arranged over the light-guiding member. Thereby, the light bulb can illuminate a wider area and achieve more uniform brightness. A light-guiding member is also disclosed.