WHITE LED LAMP BEAD, LIGHT BAR AND LIGHT FIXTURE

A white LED lamp bead, a light bar and a light fixture. A relative spectrum of the white LED lamp bead is Ф(λ). A relative spectrum of black body radiation having the corresponding color temperature is S(λ). Area normalization is performed on Ф(λ) and S(λ) to convert the same to an equal energy spectrum Ф'(λ) of the white LED lamp bead and an equal energy spectrum S'(λ) of the black body radiation having the corresponding color temperature. R-squared (R) values of the equal energy spectrum of the white LED lamp bead and the equal energy spectrum of the black body radiation satisfy the following formula (I): when λi is 380 nm, λn is 680 nm, R ≥ 85％. The invention enables a low amplitude of fluctuation in spectra and excellent spectral continuity, such that a spectrum of a light fixture of the invention approximates to the spectrum of sunlight, thereby providing a user performing indoor activities with favorable illumination resembling an outdoor environment. L'invention concerne une perle de lampe à DEL blanch