A chained flashlight system includes: plural flashlights; plural lighting control devices that control lighting of the plural flashlights, respectively; a communication wire; and a traffic control device. The plural lighting control devices include receiving units, controlling units, activating units, and power supply units, respectively and are coupled to the traffic control device by the communication wire. The traffic control device simultaneously sends an activating signal to the plural lighting control devices via the communication wire. The receiving units receive the activating signal. The controlling units activate the activating units based on a time from reception of the activating signal to activation of the activating units, set for the flashlights, respectively. When the power supply units are turned ON in an activated state of the activating units, respectively, the flashlights are lit by a lighting signal from the traffic control device, respectively.

The subject disclosure relates to solutions for testing lighting systems and in particular, for verifying lighting system operability in the event of a power failure. A process of the disclosed technology can include steps for receiving an interrupt command, toggling an interrupt relay in response to the interrupt command, and measuring one or more lighting characteristics of the lighting array to determine if the second power supply can power the lighting array. Systems and machine-readable media are also provided.

A luminosity intensity monitoring system for maintaining compliance with a regulated level of visibility of specific-purpose lighting systems. The luminosity intensity monitoring system may be compatible with both incandescent and LED-based lighting systems, and may incorporate “smart” technology built into a luminaire or separately installed circuitry, and may be installed as original equipment or configured for retro-fit applications. The luminosity intensity monitoring system may be configured to present an early visible or audible warning which may indicate the visibility of a luminaire may be at risk of being non-compliant with regulations set forth by convention or civil authority. Methods for monitoring luminosity intensity are provided, whereby if the luminosity intensity of a luminaire approaches or falls below a predetermined threshold, or a luminaire approaches or exceeds a predetermined duration of service, the luminosity intensity monitoring system may present a visible warning signal, or an audible warning signal, or combinations thereof.

Distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) techniques coupled with frequency domain decomposition (FDD) are employed to determine the presence of 120 HZ operating power frequency to determine when street lights are energized and on thereby providing continuous status monitoring of the operational status of street lights and locating affected street lights at a particular utility pole location.

To promptly detect a failure of a light source. A vehicle headlight system includes a plurality of light sources, a power supply supplying a drive voltage to the light sources, a controller individually controlling a lit/off state of each light source, and a failure detection circuit connected to the controller and detects a failure of the light sources, where, in response to a start of the vehicle, the controller executes a control operation in which all light sources are controlled from the off state to the lit state and then the light sources are controlled to the off state sequentially and individually, and where, while the control operation is executed, at least during the period of transition from the off state to the lit state of each light source, the controller acquires failure detection result and generates a warning signal when the failure is detected.

To promptly detect a failure of a light source. A vehicle headlight system includes a plurality of light sources, a power supply supplying a drive voltage to the light sources, a controller individually controlling a lit/off state of each light source, and a failure detection circuit connected to the controller and detects a failure of the light sources, where, in response to a start of the vehicle, the controller executes a control operation in which all light sources are controlled from the off state to the lit state and then the light sources are controlled to the off state sequentially and individually, and where, while the control operation is executed, at least during the period of transition from the off state to the lit state of each light source, the controller acquires failure detection result and generates a warning signal when the failure is detected.

A traffic signal lamp includes a plurality of light-emitting devices. Each light-emitting device includes a light-emitting element, a power distribution module, a power module, a controller and a measuring element. The power module is configured for converting an alternating current (AC) into a direct current (DC) and supplying the DC to the light-emitting element and the power distribution module. The measuring element is electrically coupled to the power distribution module and the light-emitting element. The controller is electrically coupled to the power distribution module and the measuring element. When a selected-one of the light-emitting devices receives the AC, the power distribution modules of the selected-one provides the DC to the controller and the measuring element of the selected-one and the power distribution module of the others of the light-emitting devices.

The subject disclosure relates to solutions for testing lighting systems and in particular, for verifying lighting system operability in the event of a power failure. A process of the disclosed technology can include steps for receiving an interrupt command, toggling an interrupt relay in response to the interrupt command, and measuring one or more lighting characteristics of the lighting array to determine if the second power supply can power the lighting array. Systems and machine-readable media are also provided.

An emergency lighting system provides testing and reporting functionality in a rapidly repeatable fashion for environments with numerous emergency lighting units. In one or more embodiments, the emergency lighting system comprises a plurality of emergency lighting units capable of conducting one or more tests and reporting their operating condition as test results. One or more terminals receive and aggregate the test results and present the same to a user. Emergency lighting units having an undesirable operating condition can then be readily identified and addressed.

A chained flashlight system includes: plural flashlights; plural lighting control devices that control lighting of the plural flashlights, respectively; a communication wire; and a traffic control device. The plural lighting control devices include receiving units, controlling units, activating units, and power supply units, respectively and are coupled to the traffic control device by the communication wire. The traffic control device simultaneously sends an activating signal to the plural lighting control devices via the communication wire. The receiving units receive the activating signal. The controlling units activate the activating units based on a time from reception of the activating signal to activation of the activating units, set for the flashlights, respectively. When the power supply units are turned ON in an activated state of the activating units, respectively, the flashlights are lit by a lighting signal from the traffic control device, respectively.