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A linear array of light emitting diodes with a lens stripe for evenly illuminating signs, which includes a linear array of light emitting diodes (LEDs) for producing a light output, and an elongated lens stripe. The linear array of LEDs includes an elongated mounting member and a plurality of LEDs mounted along the length of the mounting member. The elongated lens stripe is attached to the linear array of LEDs, and includes a reflector portion and a lens portion. The reflector portion has two elongated and opposing side walls that form an elongated channel. The side walls are light reflective. The LEDs are disposed inside the channel. The channel side walls reflect the light output from the LEDs toward the elongated open end of the channel. The lens portion has an elongated lens disposed along the open end of the channel for focusing the light output from the LEDs. The focused light output enters the side edge of a display board type sign for even illumination, or is projected onto the opaque front surface of a sign for even illumination.