| 主权项 |
1. A lamp, comprising:
a light emitting device which comprises a plurality of light emitting units with different wavelengths; and a control circuit which calibrates a control signal according to an environment light, to adjust a light spectrum of the light emitting device by controlling the luminance of each light emitting unit, wherein the control circuit further calibrates the control signal according to a photopic vision curve and a scotopic vision curve, wherein when the luminance of the environment light is reduced, the control circuit selects a second light emitting unit from the light emitting units according to a wavelength range and increases the luminance of the second light emitting unit and gradually reduces the luminance of the light emitting units except the second light emitting unit. |
