Dual-resistor airtight and waterproof bulb

A dual-resistor airtight and waterproof bulb, comprising a threaded lamp base (1), a lamp shade (2) and a stem structure (3), the threaded lamp base (1) being connected to the lamp shade (2), wherein:

• the stem structure (3) comprises a waterproof rubber base (4) and a vertical light source plate (5);
• the waterproof rubber base (4) comprises an upper insertion portion (41) and a lower assembly portion (42) which are formed integrally, the lower assembly portion (42) is arranged at an opening of the lamp shade (2) and fits the opening of the lamp shade (2) to form a filling recess (6), and the filling recess (6) is filled with a sealing rubber layer (61);
• the upper insertion portion (41) is provided with a slot (411) enabling the vertical light source plate (5) to be assembled therein;
• at least two electric wires (412) are arranged on an inner side of the slot (411);
• one of the electric wires (412) is electrically connected to a positive pole of the threaded lamp base (1), and another one of the electric wires (412) is electrically connected to a negative pole of the threaded lamp base (1);
• heat-dissipation resistors (413) are electrically connected to middle portions of the two electric wires (412);
• the vertical light source plate (5) comprises a base plate (51) and light-emitting beads (52) arranged on two opposite surfaces of the base plate (51);
• and
• the base plate (51) is provided with two conductive contacts (511), and the base plate (51) has an end inserted into the slot (411) and connecting the conductive contacts (511) and the electric wires (412) as well as an end extending into the lamp shade (2).