A turn signal canceling device for a motorcycle includes a straight-ahead travel or turn determining unit for determining whether the motorcycle is travelling straight ahead or is turning and a turn signal cancellation controller which automatically cancels turn signal operation. The invention further features plants including a recombinant transgene capable of expressing a kinase domain of a mitogen-activated protein kinase kinase kinase or a kinase domain thereof, wherein the transgene is expressed in said plant under the control of a promoter that is functional in a plant cell. The light source module is controlled to adjust a luminance of a projection light generated by a light source module starting from a low luminance. The inner sleeve is sized to be received within the lumen of the outer sleeve.