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L135FH: The light source was located at an angle of 135° to the detector head with the fruit stem–calyx axis both horizontal and perpendicular to the light beam.
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L135FV: The light source was located at an angle of 135° to the detector head with the fruit stem–calyx axis at an angle of 90° relative to the light irradiation direction.
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L90FH: The light source was located at an angle of 90° relative to the detector head with the fruit stem–calyx axis both horizontal and perpendicular to the light beam.