High photosynthetic efficiency bulb of automobile steering lamp

The invention provides a high photosynthetic efficiency bulb of an automobile steering lamp and belongs to the technical field of automobile bulbs. The high photosynthetic efficiency bulb of the automobile steering lamp comprises a mounting seat, wherein a lead I and a lead II penetrate through the mounting seat; molybdenum pins are respectively welded on the lead I and the lead II which are positioned at the lower end of the mounting seat; a lamp filament is welded between the lead I and the lead II which are arranged at the upper end of the mounting seat; a transparent bulb casing is pressedand sealed on the mounting seat; a funnel-shaped reflection cup is arranged in the bulb casing; the reflection cup is connected to the mounting seat; an end opening of the reflection cup extends to form a circular reflective ring; the mounting seat is further provided with an L-shaped exhaust channel and a T-shaped air inlet channel; both of two end openings of the L-shaped exhaust channel are ofpenetration structures; o