An image processing device includes a vision sensor and a processor. The vision sensor generates a plurality of events in which an intensity of light changes and generates a plurality of timestamps depending on times when the events occur. In addition, the processor may regenerate a timestamp of a pixel where an abnormal event occurs, based on temporal correlation of the events.

A photometric data tool can include an interface and a controller coupled to the interface. The controller can receive multiple inputs, via the interface, where the inputs are associated with a proposed customized light fixture, where the inputs include a length of the customized light fixture. The controller can also retrieves, by a photometric data generator using the plurality of inputs, historical photometric data for at least one other light fixture having at least one characteristic in common with the customized light fixture. The controller can further generates, by the photometric data generator using the historical photometric data, photometric data for the customized light fixture. The controller can also present the photometric data for the customized light fixture.

A method of configuring an LED light with a tunable diffused light color temperature is disclosed. The method comprises using a light-emitting unit configured with a first LED load emitting light with a low color temperature and a second LED load emitting light with a high color temperature electrically connected in parallel, using a light diffuser to cover the first LED load and the second LED load to create a diffused light with a diffused light color temperature, using two semiconductor switching devices working in conjunction with a controller to respectively control a first electric power delivered to the first LED load and the second electric power delivered to the second LED load to operate a color temperature tuning and switching scheme and using a first external control device to output at least one first external control signal to activate a selection of a diffused light color temperature.

Environment controller and method for proportionally adjusting a respective light intensity of a plurality of lighting devices. The environment controller determines a current light intensity for each one of the plurality of lighting devices; and determines a current average light intensity by calculating the average of the current light intensities. The environment controller determines a target average light intensity; and determines a new light intensity for each one of the plurality of lighting devices, by proportionally adjusting the light intensity of each one of the plurality of lighting devices from its respective current light intensity to its respective new light intensity, so that the average of the new light intensities is equal to the target average light intensity. The current and new light intensities may be expressed as a percentage; and the target average light intensity received from a computing device or via a user interaction with the environment controller.

An image processing device includes a vision sensor and a processor. The vision sensor generates a plurality of events in which an intensity of light changes and generates a plurality of timestamps depending on times when the events occur. In addition, the processor may regenerate a timestamp of a pixel where an abnormal event occurs, based on temporal correlation of the events.

A lifestyle LED security light including a light-emitting unit configured with two sets of LED loads respectively emitting different color temperature lights is disclosed. At dusk the light-emitting unit is automatically turned on for a first level illumination with a low color temperature light featuring an aesthetic night view with the motion sensor being deactivated for a time duration, and then the light emitting unit is changed to a second level illumination and at the same time the motion sensor is activated, wherein when the motion sensor detects a motion intrusion, the light-emitting unit is instantly switched to perform a third level illumination with a a high light intensity and a high color temperature light. The color temperatures of the first level illumination and the third level illumination are respectively adjustable by simultaneously and reversely adjusting the electric powers respectively allocated to the two sets of LED loads.

A method of configuring a white LED light with a tunable diffused light color temperature, includes using a light-emitting unit configured with a first LED load emitting light with a first color temperature between 1800K and 3000K and a second LED load emitting light with a second color temperature between 4000K and 6500K, electrically connected in parallel; using a light diffuser to cover the first LED load and the second LED load to create a diffused light with a diffused light color temperature; using two semiconductor switching devices working in conjunction with a controller to respectively control a first electric power delivered to the first LED load and a second electric power delivered to the second LED load such that a total electric power of the light-emitting unit remains unchanged; and using at least one external control device to activate a selection of the diffused light color temperature.

A two-level LED security light includes a light-emitting unit comprising at least an LED load which may be turned on or turned off by a light sensing control unit. A motion sensing unit upon an intrusion detection activates the LED load to generate a high level illumination for a time length adjustable by a time setting unit. The LED load is operated in compliance with a power supply unit wherein a voltage V across each LED is confined in a range V.sub.th<V<V.sub.max, with V.sub.th a threshold voltage and V.sub.max a maximum voltage. The light-emitting unit may be configured with two LED lighting loads emitting lights with different color temperatures, wherein a power allocation circuitry may be installed to respectively distribute different electric powers to the two LED loads to manage a color temperature tuning scheme thru a light diffuser.

A security light technology to configure an automatically setting timer used for selecting and operating a light-on duration activated by a motion sensor is disclosed. The disclosed uses a shutoff transition mode to eliminate a hassle or hardship caused by an unexpected shutoff of illumination. The shutoff transition mode also serves a communication interface between the motion sensor and an occupant remaining in a detection space such that the occupant can interrupt the shutoff transition mode. The disclosed uses a software algorithm to detect and learn the motion characteristics of occupants in the detection space and thereby to automatically set a timer to operate the light-on duration triggered by a motion intrusion. The disclosed also teaches a dual mode motion sensing light configured with a short timer to manage a pathway illumination and a long timer to manage an occupancy illumination bridged by the shutoff transition mode.

An adjustable lighting system is controlled to achieve a configuration for an internal light condition.