Abstract: Loading dock signal light change indicator apparatuses and systems including light sensors that detect a change from illumination of a red signal light to illumination of a green signal light from a loading dock signal light assembly, and that generate one or more detection signals in response to that detected change. The apparatuses and systems may additionally include one or more transmitters that transmits one or more wireless signals in response to the one or more light sensor signals, and a receiver that receives the one or more wireless signals from the transmitter(s). The receiver may be a mobile device, such as a smart phone. The receiver may then emit an audio, visual, an/or tactile signal in response to receiving the one or more wireless signals.

Abstract: Loading dock signal light change indicator apparatuses including a including light sensors that detect a change from illumination of a red signal light to illumination of a green signal light from a loading dock signal light assembly, and that generate one or more detection signals in response to that detected change. The apparatuses may additionally include one or more transmitters that transmit one or more wireless signals in response to the one or more light sensor signals, and a receiver that receives the one or more wireless signals from the transmitter(s). The apparatuses may further include devices that generate one or more audio, tactile, or visual outputs in response to the receiver receiving the one or more wireless signals, and are separate and distinct from the loading dock signal light assembly.