Led light bulb

A light-emitting diode (LED) light bulb, comprising:

• a light bulb adapter;
• a housing fixed on the light bulb adapter and having an accommodating space, wherein the housing has at least a vent hole;
• a convective heat dissipation piece comprising a first heat dissipation part and a second heat dissipation part connected under the first heat dissipation part, wherein
• the second heat dissipation part is located in the accommodating space;
• an outer border of the first heat dissipation part is exposed to the outside and a lower border of the first heat dissipation part has a first gap with respect to the upper border of the housing;
• the second heat dissipation part has a second gap with respect to an internal wall of the housing;
• the first gap, the second gap and the vent hole of the housing are connected;
• a plurality of first through-holes extend from a top surface to a bottom surface of the first heat dissipation part and connect with the first gap;
• and
• a second through-hole extends from the top surface of the first heat dissipation part to a bottom surface of the second heat dissipation part and connects with the second gap;
• a light-emitting module disposed on a top surface of the convective heat dissipation piece and having a third through-hole connected with the second through-hole;
• and
• a light bulb cover disposed on the top surface of the convective heat dissipation piece and covering the light-emitting module.