Air-Cooled and Moisture-Resistant LED Lamp and Bulb

An air-cooled and moisture-resistant LED bulb comprising:

• a bulb base including a head end provided with a bulb adapter and an open end with an opening;
• a bulb holder engaged to the open end of the bulb base, with a plurality of first ventholes provided in the bulb holder or the bulb base, with a porous waterproof fabric externally or internally covered on each of the first ventholes;
• a transparent shell engaged to the bulb holder, with the transparent shell and the bulb holder together defining a chamber therein, with the transparent shell including a plurality of second ventholes therein, with a porous waterproof fabric externally or internally covered on each of the second ventholes;
• a heat sink received in the chamber or integrally formed with the bulb holder, with the heat sink including a cavity therein;
• and
• a luminosity module held in the chamber and including a substrate mounted on the heat sink and a number of LEDs mounted on the substrate, with at least one ventilatory through-hole formed in the substrate and in communication with the cavity in the heat sink,
• wherein the cavity in the heat sink, the ventilatory through-hole in the substrate, and the first and second ventholes reach a stack effect, allowing heat dissipation inside and outside of the heat sink based on air inflow and outflow.