A remote control device may be configured to transmit command messages based on user interactions. The remote control device may receive an indication of a user interaction and transmit a command message based on the indication of the user interaction. The command message may include a command to adjust an intensity level of a lighting device and a fade period. The fade period may include the period of time over which the lighting device is to transition to the intensity level. After a transmission interval period of time from when the command message was transmitted elapses and based on a subsequent user interaction, the remote control device may transmit another command message, which may include a command for the lighting device to adjust to another intensity level over the fade period. The fade period may be longer than the transmission interval.

A remote control device may be configured to transmit command messages based on user interactions. The remote control device may receive an indication of a user interaction and transmit a command message based on the indication of the user interaction. The command message may include a command to adjust an intensity level of a lighting device and a fade period. The fade period may include the period of time over which the lighting device is to transition to the intensity level. After a transmission interval period of time from when the command message was transmitted elapses and based on a subsequent user interaction, the remote control device may transmit another command message, which may include a command for the lighting device to adjust to another intensity level over the fade period. The fade period may be longer than the transmission interval.

An anti-flicker and anti-glow switchable load apparatus to be installed in the light socket of a commonly powered electronic switching device, such as a motion activated light switch. An energy efficient light bulb or lamp, such as a cathode fluorescent lamp or light emitting diode is then screwed into the apparatus. A first embodiment of the present invention includes a switchable light source, a switchable load, a controller, and a voltage sensor. When the present invention in the first embodiment detects a higher voltage, thus indicating the lamp has been switched from the “off” state to the on state, the switchable load is disconnected, and the current is re-routed to pass through the energy efficient lamp.

An anti-flicker and anti-glow switchable load apparatus to be installed in the light socket of a commonly powered electronic switching device, such as a motion activated light switch. An energy efficient light bulb or lamp, such as a cathode fluorescent lamp or light emitting diode is then screwed into the apparatus. A first embodiment of the present invention includes a switchable light source, a switchable load, a controller, and a voltage sensor. When the present invention in the first embodiment detects a higher voltage, thus indicating the lamp has been switched from the “off” state to the on state, the switchable load is disconnected, and the current is re-routed to pass through the energy efficient lamp.

According to the present disclosure, a method for operating a discharge lamp of a projection arrangement is provided. The method includes storing the first commutation scheme in the ballast, such that the first commutation scheme fulfils a specification with respect to a first criterion, wherein the first criterion represents an electrode burnback; storing of the second commutation scheme in the ballast, such that the second commutation scheme fulfils a specification with respect to a second criterion; and operation of the discharge lamp with the alternation of the first and the second commutation schemes; characterized in that, a periodic brightness fluctuation in the discharge lamp is employed as the second criterion.

According to the present disclosure, a method for operating a discharge lamp of a projection arrangement is provided. The method includes storing the first commutation scheme in the ballast, such that the first commutation scheme fulfils a specification with respect to a first criterion, wherein the first criterion represents an electrode burnback; storing of the second commutation scheme in the ballast, such that the second commutation scheme fulfils a specification with respect to a second criterion; and operation of the discharge lamp with the alternation of the first and the second commutation schemes; characterized in that, a periodic brightness fluctuation in the discharge lamp is employed as the second criterion.

An optical communication device including a plurality of groups of light emitting diode (LED) groups that are turn on according to a control of a lighting and communication control module. The lighting and communication control module is configured to receive an AC input voltage, generate a rectified voltage from the AC input voltage, determine a voltage level of the rectified voltage, sequentially drive the plurality of LED groups according to the voltage level of the rectified voltage, and perform optical communication through the plurality of LED groups only when the voltage level of the rectified voltage is greater than or equal to a preset threshold voltage level.

An optical communication device including a plurality of groups of light emitting diode (LED) groups that are turn on according to a control of a lighting and communication control module. The lighting and communication control module is configured to receive an AC input voltage, generate a rectified voltage from the AC input voltage, determine a voltage level of the rectified voltage, sequentially drive the plurality of LED groups according to the voltage level of the rectified voltage, and perform optical communication through the plurality of LED groups only when the voltage level of the rectified voltage is greater than or equal to a preset threshold voltage level.

According to an aspect of the invention, a method of controlling a lighting device is provided. The method comprises receiving an input from a dimmer, the input being representative of a desired light output level for the lighting device. A control voltage for operating a driver unit comprised in the lighting device is computed based on the input and a calibrated relationship between power consumption and control voltage for the lighting device.

According to an aspect of the invention, a method of controlling a lighting device is provided. The method comprises receiving an input from a dimmer, the input being representative of a desired light output level for the lighting device. A control voltage for operating a driver unit comprised in the lighting device is computed based on the input and a calibrated relationship between power consumption and control voltage for the lighting device.