Lighting device with regions of differing spectral ranges

A lighting device, comprising:

• a board;
• a plurality of first light emitting elements, emit lights in a first spectral range, wherein the first spectral range is a range of white light spectrum;
• a plurality of second light emitting elements, emit lights in a second spectral range, wherein the second spectral range is narrower than the first spectral range, wherein the second spectral range is a range of red light spectrum, wherein the second spectral range is within the range of 600 nanometers to 700 nanometers, wherein the first light emitting elements are disposed in at least one first region of the board, wherein the second light emitting elements are disposed in a plurality of second regions of the board, wherein the at least one first region and the second regions are alternately arranged on the board, and wherein the first light emitting elements in the at least one first region and the second light emitting elements in the second regions are arranged in two-color checkerboard pattern on the board;
• a light dimming device, electrically coupled to the first light emitting elements and the second light emitting elements, wherein the light dimming device is configured to:
• in a health care mode, control the first light emitting elements to emit lights having greater luminous intensity and control the second light emitting elements to emit lights having less luminous intensity;
• and
• a plurality of third light emitting elements, wherein the third light emitting elements are disposed in a third region of the board, and wherein the at least one first region and the second regions are surround by the third region.