of lens casing 4 i e perpendicular to and away from vertical surface 4a thus the light is substantially not radiated from the horizontal surfaces 4b of lens casing 4 this prevents projection of light in an upward direction which diffuses the forward directed light beam from vertical surface 4a and thus prevents dazzling the driver following the vehicle for this reason shielding means such as a coating of the horizontal surface 4b of lens casing 4 is not necessary nor is a shielding member to prevent the upward deflection of light necessary fig5 shows a typical connection of groups of led 39 s in which the led 39 s 2 of each group are connected in series and the groups are connected in parallel resistors r are used for controlling the flow of electric current through the led 39 s of each group each group of series connected led 39 s includes 4 or 5 led 39 s and the overall lamp device of the present invention utilizes approximately 100 led 39 s in total the parallel connection of the led 39 s is connected to the conventional brake lamp switch 10 as shown in fig5 if an led becomes defective i e open circuited only the particular group is affected the remaining groups.