Light device for plant cultivation

A light device comprising:

• a first light source comprising multiple first light emitters and multiple second light emitters, wherein the multiple first light emitters and the multiple second light emitters are configured to emit light toward a target;
• a distance measurer configured to measure a distance between the first light source and the target;
• and
• a controller configured to control operation of the first light source based on a comparison between the distance measured by the distance measurer and a predetermined value,
• wherein the multiple second light emitters are disposed at least between a pair of first light emitters,
• wherein each of a plurality of the multiple first light emitters is configured to emit light having a first peak wavelength and each of a plurality of the multiple second light emitters is configured to emit light having a second peak wavelength, wherein the second peak wavelength differs from the first peak wavelength,
• wherein a distance between a second light emitter of the multiple second light emitters and a first light emitter of the multiple first light emitters located adjacent there to is different from a distance between a pair of adjacent first light emitters of the multiple first light emitters,
• wherein the multiple first light emitters are operated together and the multiple second light emitters are operated together,
• wherein, based on the comparison that the measured distance is greater than or equal to the predetermined value, the controller is configured to control the first light source such that the multiple first light emitters are operated, and
• wherein, based on the comparison that the measured distance is less than the predetermined value, the controller is configured to control the first light source such that the multiple second light emitters are operated.

A light device comprising:

• a first light source comprising multiple first light emitters and multiple second light emitters,
• wherein the multiple first light emitters and the multiple second light emitters are configured to emit light toward a target, wherein the target is a plant,
• a second light source comprising another multiple first light emitters arranged at constant intervals, the second light source emitting light for plant cultivation toward the plant,
• a distance measurer configured to measure a distance between the plant and the first light source, the second light source, or both;
• and
• a controller configured to control operation of the first light source and the second light source based on a comparison between the distance measured by the distance measurer and a predetermined value,
• wherein the multiple second light emitters are disposed at least between a pair of first light emitters,
• at least one of the multiple first light emitters is disposed between a pair of first light emitters without any intervening second light emitters,
• the multiple first light emitters are operated together and the multiple second light emitters are operated together,
• wherein each of a plurality of the multiple first light emitters is configured to emit light having a first peak wavelength and each of a plurality of the multiple second light emitters is configured to emit light having a second peak wavelength, wherein the second peak wavelength differs from the first peak wavelength,
• wherein at least one of:
• the multiple first light emitters or the multiple second light emitters, includes at least one light emitter configured to emit light having a third peak wavelength that differs from a corresponding first peak wavelength or second peak wavelength of the at least one of:
• the multiple first light emitters or the multiple second light emitters,
• wherein an intensity of the light having the third peak wavelength is lower than an intensity of the corresponding first peak wavelength or second peak wavelength, and
• wherein a distance between a second light emitter of the multiple second light emitters and a first light emitter of the multiple first light emitters located adjacent there to is different from a distance between a pair of adjacent first light emitters of the multiple first light emitters.