White light LED lamp bead, lamp bar and lamp

The invention provides a white light LED lamp bead, a lamp bar and a lamp. The relative spectrum of the white light LED lamp bead is theta(lambda) and the relative spectrum of the black body radiationat a corresponding color temperature is S(lambda). The theta(lambda) and the S(lambda) are normalized and converted into the equivalent-energy spectrum theta' (lambda) of the white light LED lamp bead and the equivalent-energy spectrum S' (lambda) of the black body radiation at the corresponding color temperature. The fitting degree R of the equivalent-energy spectrum of the white LED lamp bead and the equivalent-energy spectrum of the black body radiation meets the following formula: when lambda i is 380nm and lambda n is 680nm, R is greater than or equal to 85%. The spectrum fluctuation range is small, and the continuity is excellent. The sunlight is closer to the sun. The good illumination effect can be provided for users. Therefore, users can obtain the impression similar to that of outdoor activity during th