Wide-angle luminous led bulb with cooling flue

A wide-angle luminous LED bulb with a cooling flue comprises a lamp holder (1), a light source assembly (4), an upper radiator (5), a lower radiator (3), a driver (7) and a diffuser (8). The light source assembly (4) is mounted at the joint part of the upper radiator (5) and the lower radiator (3). The upper radiator (5) and the lower radiator (3) are arranged in the diffuser, and are respectively provided with a hollow channel. The lamp holder (1) is provided with a ventilation hole (2), and the ventilation hole (2) is in communication with the hollow channel to form a cooling flue (6). Air convection is formed via the flue to increase the cooling effect. The light source assembly (4) adopts a curved aluminium substrate, and surrounds the joint part of the upper radiator (5) and the lower radiator (3) circumferentially, or the aluminium substrate is curved into a petaloid shape to ensure sufficient contact areas between the aluminium substrate and the radiators, and at the same time the luminous angle of the bulb is optimized.