Patlite Single Tower Light The Patlite LED light unit is an LED unit for LR7 series. Lights can be added or removed from signal towers without rewiring or reconfiguring hardware. It has a blue LED. Module units MUST be removed one at a time from the signal tower, from top to bottom, or the internal hardware can get damaged. Features and Benefits • Modular "Twist and Lock" system to easily customize and reconfigure LED and sound modules