A light positioning system for use in transferring a container to a buffer is disclosed. The system includes a light signal that is disposed adjacent the buffer for guiding an operator to position a chassis into the buffer and a program logic controller. The system also includes a thru beam sensor. The thru beam sensor senses movement of the container into the buffer and outputs data to the program logic controller. The system further includes a distance sensor. The distance sensor determines a distance from the distance sensor to the container and outputs data to the program logic controller. The program logic controller determines a length of the container based on the data received from the thru beam sensor and the distance sensor and provides an output signal to the light signal based on the length of the container and the data received from the distance sensor.