Methods and apparatus for a security light having a remote photovoltaic module is set forth. The security light includes a primary rechargeable battery connected to the remote photovoltaic module while also having a backup battery system to be utilized when the rechargeable batteries condition require recharge. The security lighting unit functions as a security light to provide variable wide area illumination based upon environmental and battery conditions and also which power supply is optionally connected to the load, the load being the illumination sources and the various supportive electronics. The system further includes a controller which can not only operationally selects either the rechargeable batteries or backup batteries but also can monitor battery condition to preserve battery life. In operation, the security light may include a variable battery power supply for ease of installation.

A light-emitting diode (LED) lamp comprising a normally-operated portion and an emergency-operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally-operated portion comprises a second driving circuit whereas the emergency-operated portion comprises a rechargeable battery, a first driving circuit, a self-diagnostic circuit, and a control circuit. The LED lamp can auto-switch between the normal mode and an emergency mode according to availability of the AC mains and whether a rechargeable battery test is initiated. The control circuit is configured to produce a pulse train with a predetermined duty cycle to operate the first driving circuit while disabling the second driving circuit to eliminate operational ambiguity during the rechargeable battery test. The self-diagnostic circuit is configured to provide multiple sequences and to auto-evaluate battery performance by sending the pulse train to operate the first driving circuit according to the multiple sequences.

Emergency light devices, systems and methods that provide instant light in a power outage or other situations. One or more sensors monitor the flow of electricity, and when the flow of electricity is stopped or no longer present, an emergency light device power monitoring device instantly communicates via wireless communication technology to emergency light device(s) to instantly turn on the emergency light device(s). The emergency light device(s) can be a portable and/or permanent unit of varying shapes and sizes, and can be attached to any object, or may stand alone, with some or all of its parts being replaceable, interchangeable, or upgradeable.

A light-emitting diode (LED) luminaire comprises an emergency-operated portion comprising a rechargeable battery with a terminal voltage, a self-diagnostic circuit, and a node modulator-demodulator (MODEM). The LED luminaire can auto-switch from a normal power to an emergency power according to availability of the normal power and whether a rechargeable battery test is initiated. The self-diagnostic circuit comprises a clock and is configured to initiate self-diagnostic tests and to auto-evaluate battery performance according to test schedules with the terminal voltage examined and test results stored. The LED luminaire further comprises a remote controller configured to initiate control signals with phase-shift keying (PSK) signals transmitted and to collect test data to and from the node MODEM. The node MODEM is configured to demodulate the PSK signals and to send commands to the self-diagnostic circuit to request responses accordingly.

An LED luminaire emergency driver comprises a rechargeable battery, a charger circuit, an LED driving circuit, and a charging and discharging control circuit. The LED luminaire emergency driver is intended to automatically supply a first supplied voltage to drive LED arrays in an event of a normal power failure. The LED driving circuit is configured to convert a terminal voltage from the rechargeable battery into the first supplied voltage when a line voltage from AC mains is unavailable. The charging and discharging control circuit comprises a relay switch and a transistor circuit assembly configured to sense a charging voltage, to control switching between normal power and an emergency power to operate the LED arrays, and to meet regulatory requirements without operational ambiguity and safety issues.

An emergency lighting power supply includes a rechargeable battery; ballast circuitry configured to supply power to an external light, battery charging circuitry configured to charge the battery, and a controller. The controller determines an amount of time the rechargeable battery has discharged to supply power, via the ballast circuitry, to the external light. If the amount of time is less than a threshold, the controller causes the battery charging circuitry to supply a first current to charge the battery for a first charging period that is proportional to the amount of time, and causes the battery charging circuitry to supply a second current to charge the battery subsequent to the end of the first charging period.

A lamp device with power outage sensing abilities to detect when a primary power source is interrupted and to energize primary LEDs when primary power source is ON, and to energize backup LEDs when the primary power source is OFF. The power outage sensing circuit may also detect a light switch condition allowing for greater efficiency in emergency power supply usage. A battery charging system may provide battery thermal protection and multiple charge rates to improve battery charging as a function of the temperature in the lighting device.

A light-emitting diode (LED) smart control circuit and the related LED lighting device are provided. The LED smart control circuit includes a microprocessor, a bridge rectifier, a transformer circuit, a power grid detection unit, a voltage detection unit, a battery charging controller, a first sampling circuit, a second sampling circuit, a constant current controller, and an external rechargeable battery. The LED smart control circuit is configured for controlling LED light source components to emit light. An LED lighting device includes the LED light source components, a smart control circuit board, a rechargeable battery, a shell, and a lamp head. The smart control circuit board is integrated with the disclosed LED smart control circuit.

A lamp includes a first pair of primary electrical contacts configured to be electrically connected to a AC mains, a second pair of primary electrical contacts configured to be electrically connected to a non-switched emergency mains, and a battery charge controller in electrical communication with the second pair of electrical contacts. The lamp also includes a battery pack in electrical communication with the battery charge controller, an AC mains driver electrically connected to the first pair of primary electrical contacts, an emergency driver electrically connected to the battery pack, and an LED array in electrical communication with the AC mains driver and the emergency driver.

Techniques are presented herein to operate a light fixture as in an emergency mode in order to verify that the light emitted by the light fixture when operated in the emergency mode complies with emergency operating policies, as well as to detect failures. The light emitted by the light fixture in emergency mode may be measured and adjusted to optimize the runtime of the light fixture in the emergency mode. The light fixture is connected to a lighting control system via a control network which supplies electrical power to charge an onboard battery of a light fixture and to operate the light fixture. The light fixture may be caused to operate in the emergency lighting mode when a main electrical power supply is interrupted or when performances of the light fixture and of the onboard battery are tested.