High-luminous-efficiency warm white light emitting part

The utility model discloses a warm white light emitting piece with high luminous efficiency. Comprising a driving plate, the driving plate is fixed to the bottom of a support with double-layer gradually-shrinking recesses, and a single-color LED light-emitting chip is fixed to the driving plate and conducts a PN pole; the single-color LED light-emitting chip is sequentially coated with a first fluorescent layer and a second fluorescent layer; the double-layer tapered recess is divided into a bottom layer and a top layer, and the central axis of the bottom layer coincides with that of the top layer. According to the light-emitting part, the double-layer gradually-shrinking concave support is adopted, the light effect and the color rendering property of the light-emitting part are controlled by controlling the thicknesses of the first fluorescent layer and the second fluorescent layer and the positions of the first fluorescent layer and the second fluorescent layer in the support, an encapsulation layer and a l