of the lens 52 is substantially planar and a second side 56 of the lens 52 has a convex shape in use a first set of light rays 58 is emitted from the light emitting element 42 of the lighting module 40 the first set of light rays 58 is reflected from the inner surface 46 of the reflector 44 towards the shield 48 the first set of light rays 58 is reflected from the upper surface 50 of the shield 48 and directed to the first side 54 of the lens 52 the lens 52 illustrated in fig5 has been moved upwardly from the position shown in fig1 as indicated by the arrow l the first set of light rays 58 is reflected from the reflector 44 to impinge upon a different part of the first side 54 of the lens 52 from that shown in fig1 the first set of light rays 58 pass through the lens 52 and exit the second side 56 of the lens 52 upon exiting the second side 56 of the lens 52 the first set of light rays 58 is caused to be directed in an upward direction from horizontal thus the first set of light rays 58 forms a pattern consistent with the high beam mode a second set of light rays 60 is emitted from the light emitting element 42 with the first set of light rays 58 the second set of light rays 60 is reflected from the inner surface 46 of the reflector 44 towards the shield 48 however the second set of light rays 60 is not directed on the upper surface 50 of the shield 48 the second set of light rays 60 bypass the shield 48.