Surface-mounted LED lamp bead and COB LED device

The utility model relates to a paster type LED lamp bead and a COB LED device, a light emitting unit adopts an LED chip unit with a blue light peak wavelength of 432nm-463nm, the light emitting unit is specifically composed of a first LED chip unit and a second LED chip unit which are connected in series or in parallel, the blue light peak wavelength of the first LED chip unit is different from the blue light peak wavelength of the second LED chip unit, and the blue light peak wavelength of the second LED chip unit is different from the blue light peak wavelength of the first LED chip unit. The radiation power of a second LED chip in the second LED chip unit is smaller than or equal to that of a first LED chip in the first LED chip unit, so that distribution of blue light energy is balanced; and through spectrum coupling between the LED chip unit and the fluorescent powder in the packaging adhesive, the blue light peak value of the surface-mounted LED lamp bead and the COB LED device in the spectrum can be re