A LED linear lamp that eliminates the cave effect by transmits the majority of its light downwardly in a main illumination direction and a lesser amount of light upwardly in a secondary illumination direction that is in a direction opposite to the main illumination direction. The LED linear lamps of the invention have one or more circuit boards with LEDs positioned thereon. These circuit boards with LEDs are positioned in a light transparent or translucent tube. Down lighting in the main illumination direction is provided by having some LEDs facing downwardly in the primary illumination direction, while up lighting is provided by having some LEDs facing upwardly or by provision of light transmission holes in the circuit board to permit some light leakage upwardly.