These RLR Series lamps are designed for use in the low profile train lighting fixtures. These lamps tolerate voltage spreads characteristic of light rail train car systems without fluctuating in light intensity. The LED Lighting tube can be used in new or to retrofit fluorescent installations. The Premium lighting systems offers customers the best in LED technology. The patented RLR light tubes use the latest high power premium LEDs while providing a more superior, reliable and efficient light source than conventional fluorescent systems.