Patent Publication Number: US-2023156886-A1

Title: User interface for controlling intensity and color of a lighting load

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 17/479,385, filed Sept. 20, 2021; which is a continuation of U.S. patent application Ser. No. 17/082,395, filed Oct. 28, 2020, now U.S. Pat. No. 11,129,251 issued Sep. 21, 2021; which is a continuation of patent application Ser. No. 16/821,896, filed Mar. 17, 2020, now U.S. Pat. No. 10,827,581 issued Nov. 3, 2020; which is a continuation of U.S. patent application Ser. No. 15/832,532, filed Dec. 5, 2017, now U.S. Pat. No. 10,645,777 issued May 5, 2020; which claims the benefit of Provisional U.S. Patent Application No. 62/430,189, filed Dec. 5, 2016, the disclosures of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND 
     The intensity and/or color of a lighting fixture may be manipulated for a variety of purposes such as presentation, comfort, and well-being. Typical color control techniques may include dim-to-warm, correlated color temperature (CCT), and full color tuning. The dim-to-warm control technique allows for adjusting the color temperature of a light source in proportion to the intensity so as to mimic the color shift of incandescent lamps with respect to intensity (e.g., warmer color temperature at lower light levels, cooler color temperature at higher light levels). The correlated color temperature control technique allows for controlling the color temperature and intensity of a light source independently within specified parameters. The full color tuning control technique allows for changing the emitted color spectrum of a light source by mixing several base colors (e.g., red, green, blue) in different proportions. 
     Different types of intensity control/color tuning techniques may require different types of user interfaces. The dim-to-warm control technique, for example, generally requires one control input. The input may be translated (e.g., by an LED driver) into an appropriate intensity and/or color control signal for driving the lighting fixture. The correlated color temperature control technique and/or the full color tuning control technique may require one control input for color temperature and a separate control input for light intensity. A user interface may also need to be capable of activating and/or deactivating preconfigured environmental settings (e.g., a lighting scene created by tuning one or more lighting fixtures to particular color and/or intensity values). Further, a user may desire to not only apply the aforementioned types of control, but also receive feedback about the type, amount and/or result of the control being applied. 
     SUMMARY 
     As described herein, a load control device may be provided that includes a user interface for controlling the intensity and color of one or more lighting loads. The load control device may be a wall-mounted electrical device having a limited area for presenting the user interface to a user (e.g., through an opening of a faceplate). The user interface may be designed with a focus on the ease of use of the controls. The user interface may present one or more actuators for controlling the intensity and color of the lighting loads in a manner that is compact, but easy to understand. Functions that are in greater demand may be made more prominent on the user interface and/or easier to actuate by the user. For example, priority in terms of size, placement, durability, and/or smartness of an actuation mechanism may be given to switch actions (e.g., on/off), followed by intensity control and color turning. In some examples, the actuators for controlling intensity may be emphasized over the actuators for controlling color. 
     In one example, the user interface may include separate actuation members for adjusting the intensity or color of the lighting loads. The user interface may comprise a first elongated actuator configured to receive a first user input for controlling the intensity of the lighting load, and a second elongated actuator configured to receive a second user input for controlling the color of the lighting load. The first elongated actuator may be provided on a bezel of the control device, and may be vertically arranged along the bezel. The second elongated actuator may also be provided on the bezel and horizontally arranged along the bezel. The user interface may further comprise a rectangular toggle actuator, where the vertically-arranged actuator is located along a side of toggle actuator, and the horizontally-arranged actuator is located along a bottom of the toggle actuator. The vertically-arranged actuator may have a length that is shorter than a length of the toggle actuator, and the horizontally-arranged actuator may have a length that is shorter than a width of the toggle actuator and shorter than the length of vertically-arranged actuator. Such a design focus may result in, for example, a user interface comprising a “big switch” for toggling the lighting load on and off, a “little dimmer” for adjusting the intensity of the lighting load, and a “tiny color control” for adjusting the color of the lighting load. 
     In another example, the vertically-arranged and horizontally-arranged actuators may each comprise a slider knob provided in a slider slot. For example, the slider slot of the horizontally-arranged actuator may be located below the slider slot of the vertically-arranged actuator, or the slider slot of the horizontally-arranged actuator may be located on the slider knob of the vertically-arranged actuator. 
     In another example, the user interface may include a common actuator for adjusting both intensity and color of the lighting load. The user interface may be configured to operate in either an intensity or a color control mode. The control mode of the common actuator may be set before the actuator is used to set the intensity or color of the lighting loads. The control mode of the actuator may be set via a button, a lever, a rotary switch, a rotary knob, and/or the like. 
     The user interface may include a touch sensitive element (e.g., a touch sensitive actuator or a capacitive touch panel) capable of sensing a user&#39;s touch and translate the touch into a signal for driving the lighting loads. Feedback may be provided on the user interface to indicate the type of control being adjusted and/or amount of control being applied to the lighting loads. The feedback may be provided via one or more indicator lights or a light bar, for example. The user interface may be further configured to activate preconfigured settings of the light loads. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1 A  shows block diagram of an example load control system that includes a load control device for controlling the intensity and/or color of a lighting load. 
         FIG.  1 B  shows a simplified block diagram of an example control device that may be deployed in the load control device depicted in  FIG.  1 A . 
         FIG.  2    shows a front view of an example user interface comprising a plurality of actuators for adjusting the intensity and color of a lighting load, and a visual display for indicating the intensity and/or color the lighting load. 
         FIG.  3    shows a front view of an example user interface comprising two touch-sensitive actuators for controlling the intensity and color of a lighting load. 
         FIG.  4 A  is a front view and  FIG.  4 B  is a right side view of an example user interface comprising an intensity adjustment actuator and a color adjustment actuator located below the intensity adjustment actuator. 
         FIG.  5 A  is a front view and  FIG.  5 B  is a right side view of an example user interface comprising an intensity adjustment actuator and a color adjustment actuator provided on the intensity adjustment actuator. 
         FIG.  6 A  is a perspective view and  FIG.  6 B  is a front view of an example user interface comprising a rotating slider knob for adjusting the intensity and color of a lighting load. 
         FIGS.  7 A and  7 B  are front views of another example user interface comprising a rotating slider knob for adjusting the intensity and color of a lighting load. 
         FIGS.  8 A and  8 B  are front views of another example user interface comprising a slider knob and two actuators located on the slider knob for adjusting the intensity and color of a lighting load. 
         FIG.  9    shows a front view of an example user interface comprising two sets of controls for adjusting the intensity and color of a lighting load. 
         FIG.  10    shows a perspective view of an example user interface comprising an actuator and a control mode selector. 
         FIG.  11    shows a front view of an example user interface that utilizes a toggle button to set the control mode of an actuator for controlling the intensity and color of a lighting load 
         FIG.  12    shows a front view of an example user interface that utilizes a slider to set the control mode of an actuator for controlling the intensity and color of a lighting load. 
         FIGS.  13 - 16 B  are flowcharts of example control procedures that may be executed by a control circuit of a control device to control a lighting load in response to inputs received via a user interface. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1 A  depicts an example load control system  100 . As shown, the load control system  100  may be configured as a lighting control system comprising a lighting load, such as a controllable light source  110 , and a load control device  120 . The load control device  120  may be adapted to be wall-mounted in a standard electrical wallbox. The load control device  120  may be coupled (e.g., via a series electrical connection) between an alternating-current (AC) power source  102  and the controllable light source  110 . The controllable light source  110  may include an internal lighting load (e.g., a light-emitting diode (LED) light engine) and an internal load regulation circuit (e.g., an LED driver). In addition, the load control device  120  may not be wall-mounted, but may be a plug-in load control device configured to be coupled between an electrical receptacle and a plug-in electrical load. 
     The load control device  120  may include a user interface  122  that may comprise one or more actuators for controlling an intensity and a color (e.g., a color temperature) of the controllable light source  110 . For example, the user interface  122  may comprise a toggle actuator  124  configured to be actuated for toggling, e.g., turning off and on, the controllable light source  110 , and an intensity adjustment actuator  126  configured to be actuated for changing a lighting intensity of the controllable light source  110 , and/or a color adjustment actuator  128  configured to be actuated for changing a color of the controllable light source  110 . In one example, the toggle actuator  124  may be larger than the intensity adjustment actuator  126 , which may be larger than the color adjustment actuator  128  in order to emphasize adjustment of the intensity of the controllable light source  110  over adjustment of the color of the light source. In another embodiment, a common actuator may function as the intensity adjustment actuator  126  and the color adjustment actuator  128 . The load control device  120  may adjust the intensity of the controllable light source  110  in response to the common actuator when operating in an intensity adjustment mode, and may adjust the color of the controllable light source  110  in response to the common actuator when operating in a color adjustment mode. 
     The user interface  122  of the load control device  120  may also comprise a visual display (not shown) that may be illuminated, e.g., by a plurality of light-emitting diodes (LEDs). The visual display may be arranged as an array of indicator lights or as a light bar, to provide feedback about the operational state of the light source  110  (e.g., to indicate intensity or color of the light source). An example of a load control device including a visual display is described in greater detail in U.S. Pat. No.  5 , 248 , 919 , issued Sep.  28 ,  1993 , entitled LIGHTING CONTROL DEVICE, the entire disclosure of which is hereby incorporated by reference. 
     The load control device  120  may be configured to generate one or more control signals that may be received by the controllable light source  110  for turning the controllable light source on and off, and/or for the adjusting the intensity and/or color of the controllable light source. For example, the load control device  120  may be configured to transmit wireless signals, for example radio frequency (RF) signals  108 , to the controllable light source  110 . The wireless signals may be used to control the intensity and/or color of the controllable light source  110 . The controllable light source  110  may be associated with the load control device  120  (e.g., during a configuration procedure of the load control system  100 ) such that the controllable light source  110  may be responsive to the RF signals  108  transmitted by the load control device  120 . An example of a configuration procedure for associating a load control device with an electrical load is described in greater detail in commonly-assigned U.S. Patent Publication No. 2008/0111491, published May 15, 2008, entitled “Radio-Frequency Lighting Control System,” the entire disclosure of which is hereby incorporated by reference. In another example, the load control device  120  may be implemented as a free-standing remote control device (e.g., such as a table-top load control device or a hand-held load control device) or a mountable remoted control device (e.g., such as a remote control device capable of being mounted on an existing switch). 
     It should be appreciated that while a wireless communication scheme is shown as being used in  FIG.  1 A , the load control device  120  may communicate with the light source  110  using either or both of wired and wireless communication techniques. For example, the load control device  120  may be coupled to the controllable light source  110  via one or more analog control links (e.g., two 0-10V control links) for controlling the intensity and/or color of the controllable light source. In addition, the load control device  120  may be configured to generate a phase-control signal for controlling the intensity of the controllable light source  110  and may transmit wireless signals for controlling the color of the controllable light source. While the controllable light source  110  is shown in  FIG.  1    as a screw-in lamp, the controllable light source may also be implemented as a lighting fixture that includes one or more LED light engines and one or more LED drivers. 
       FIG.  1 B  is a simplified block diagram of an example control device  130  for a load control device (e.g., the load control device  120  shown in  FIG.  1 A ). The control device  130  may include a hot terminal H that may be adapted to be coupled to an AC power source  132 . The control device  130  may further include an output terminal T that may be adapted to be coupled to an electrical load, such as a lighting load  133  (e.g., the controllable light source  110  shown in  FIG.  1   ). The control device  130  may include a controllably conductive device  134  coupled in series electrical connection between the AC power source  132  and the lighting load  133 . The control device  130  may include a control circuit  135  configured to control the controllably conductive device  134  to render the controllably conductive device  134  conductive or non-conductive to control the power delivered to the lighting load  133 . 
     An air-gap switch  139  may be coupled in series with the controllably conductive device  134 . The air-gap switch  139  may be opened and closed in response to actuations of an air-gap actuator. When the air-gap switch  139  is closed, the controllably conductive device  134  is operable to conduct current to the load. When the air-gap switch  139  is open, the lighting load  133  is disconnected from the AC power source  132 . The controllably conductive device  134  may operate as a relay to turn the lighting load on and off, e.g., when the control device  130  is not configured to perform phase control over the lighting load  133 . The controllable conductive device  134  may be omitted from the control device  130 , in which case the load control device may be implemented as a free-standing remote control device (e.g., powered by AC or DC voltage), as described herein. 
     The control device  130  may comprise a user interface including one or more actuators  136  and one or more visual indicators, which may be illuminated by light-emitting diodes (LEDs)  137 . The control circuit  135  may receive inputs from the actuators  136  and translate the inputs into control signals (e.g., intensity and/or color control signals) for transmission to the lighting load  133 . The control circuit  135  may control the LEDs  137  to illuminate the visual indicators to provide feedback to the user about the operational status of the lighting load  133  (e.g., the intensity and/or color of the light sources). 
     The control device  130  may include a communication circuit  140  coupled to the control circuit  135  for transmitting and/or receiving digital messages between the control device  130  and the lighting load  133 . The communication circuit  140  may be configured to transmit the control signals generated by the control circuit  135  (e.g., intensity and/or color control signals) to the lighting load  133  using a wireless communication scheme (e.g., via radio frequency signals). Alternatively or in addition to the wireless communication scheme, the communication circuit may be configured to transmit the control signals using wired communication techniques. For example, the control circuit  135  may utilize multi-wire digital communication links such as digital addressable lighting interface (DALI), Ecosystem links, or other proprietary communication links for transmitting the control signals to the lighting load  133 . As another example, the control circuit  135  may utilize the power line to transmit the control signals. Techniques for providing communication via existing power wiring are described in greater detail in commonly-assigned U.S. Pat. No. 9,392,675, issued Jul. 12, 2016, entitled “Digital Load Control System Providing Power and Communication via Existing Power Wiring,” and U.S. Pat. No. 8,068,814, issued Nov. 29, 2011, entitled “System for Control of Lights and Motors,” the entire disclosures of which are hereby incorporated by reference. 
     Alternatively or additionally, the control circuit  135  may be configured to transmit the control signals via one or more wired analog control links (e.g., phase-control signals or 0-10V control signals). For example, the control circuit  135  may generate two phase-control signals or two 0-10V control signals to respectively control the intensity and color of the lighting load  133 . As another example, the control circuit  135  may utilize phase-control to control the intensity of the lighting load  133 , and RF communication to control the color of the lighting load  133 . 
     The control device  130  may include a memory  138  coupled to the control circuit  135 . The memory  138  may be used to store the operational parameters of the control device  130  and/or the lighting load  133  (e.g., such as the intensity/color of the lighting load  133  before it is turned off, preconfigured lighting scenes and their associated intensity/color, etc.). The memory  138  may be implemented as an external integrated circuit (IC) or as an internal circuit of the control circuit  135 . The load control device  130  may include a power supply  141 . The power supply  141  may generate a direct-current (DC) supply voltage V CC  for powering the control circuit  135  and the other low-voltage circuitry of the control device  130 . The power supply  141  may be coupled in parallel with the controllably conductive device  134 . The power supply  141  may be operable to conduct a charging current through the lighting load  133  to generate the DC supply voltage V cc . 
     Although a single lamp is shown in  FIGS.  1 A and  1 B , the lighting load  133  may include one or more light sources (e.g., LED light sources), and one or more LED drivers or control devices. The lighting load  133  may include an enclosure configured to house one or more electrical components of the lighting load (e.g., such as one or more load regulation circuits). The one or more electrical components may be operable to control the intensity of the lighting load  133  between a low-end intensity (e.g., approximately 1%) and a high-end intensity (e.g., approximately 100%). The one or more electrical components may be operable to control the color of the light emitted by the lighting load  133 . For example, when the lighting load  133  comprises one or more LED light sources, the one or more electrical components may be operable to control the colors of the LED light sources in a color temperature control mode or a full-color control mode. The lighting load  133  may include a communication circuit (e.g., a wireless communication circuit) configured to receive the control signals transmitted from the control device  130 , and to control the intensity and/or color of the lighting load in response to receiving the control signals. 
       FIG.  2    shows a front view of an example user interface  200  that may be provided on a load control device described herein (e.g., the load control device  120 ). The user interface  200  may include a rectangular toggle actuator  210 , an elongated vertically-arranged actuator, such as an intensity adjustment actuator  212 , and/or an elongated horizontally-arranged actuator, such as a color adjustment actuator  214 . The toggle actuator  210 , the intensity adjustment actuator  212 , and the color adjustment actuator  214  may be provided on a bezel  202 . The bezel  202  may extend through an opening  206  in a faceplate  204  that covers the wallbox in which one or more components of the load control device may be mounted. The intensity adjustment actuator  212  may extend vertically along a vertical axis of the bezel  202  and/or the faceplate  204  when the load control device is installed. The color adjustment actuator  214  may extend horizontally along a horizontal axis of the bezel  202  and/or the faceplate  204  when the load control device is installed. Actuation of the toggle actuator  210  may toggle, e.g., turn off and on, a light source (e.g., the light source  110 ) connected to the load control device. Actuations of the intensity adjustment actuator  212  and color adjustment actuator  214  may respectively adjust the light intensity or color (e.g., color temperature) of the light source. For example, the intensity adjustment actuator  212  may be used to adjust an intensity level, for example, between a minimum intensity level (e.g., approximately 1%) and a maximum intensity level (e.g., approximately 100%) for the light source. The color adjustment actuator  214  may be used to adjust a color (e.g., a color temperature) of the light source, for example, between a first color temperature (e.g., a warm-white color temperature, such as 2000 Kelvin) and a second color temperature (e.g., a cool-white color temperature, such as 10,000 Kelvin). Actuations of an upper portion and a lower portion of the intensity adjustment actuator  212  may raise and lower the light intensity of the light source, respectively. Actuations of a right portion and a left portion of the color adjustment actuator  214  may adjust the color temperature of the light source towards the first and second color temperatures, respectively. 
     The toggle actuator  210 , the intensity adjustment actuator  212 , and the color adjustment actuator  214  may be configured to enhance the usability of the user interface  200 . Actuators that are in greater demand (e.g., which are used more often and/or require quick/easy access) may be made more prominent on the user interface and/or easier to actuate by the user. For example, priority in terms of size, placement, durability, and/or smartness of an actuation mechanism may be given to the toggle actuator  210  (e.g., for switching the light source on/off), followed by the intensity adjustment actuator  212 , and then the color adjustment actuator  214 . As shown in  FIG.  2   , for example, the toggle actuator  210  may have a rectangular shape, which may be the biggest size among the controls, and may be placed in the center of the user interface  200 . The intensity adjustment actuator  212  may be smaller in size than the toggle actuator  210  (e.g., having a smaller area than the toggle actuator  210  and having a length that is shorter than a length of the toggle actuator  210 ). The intensity adjustment actuator  212  may occupy a less prominent area of the user interface than the toggle actuator  210  (e.g., along one side of the toggle actuator  210 ). The color adjustment actuator  214  may have the smallest size (e.g., having a smaller area than the toggle actuator  210  and having a length that is shorter than a width of the toggle actuator  210 ). The color adjustment actuator  214  may have a shorter length than the length of the intensity adjustment actuator  212 . The color adjustment actuator  214  may occupy another less prominent area of the user interface than the toggle actuator  210  and the intensity adjustment actuator  212  (e.g., along the bottom of the toggle actuator  210 ). 
     As described herein, the intensity adjustment actuator  212  and the color adjustment actuator  214  may be provided apart and/or oriented differently from each other (e.g., to avoid misuse of the actuators). For example, the intensity adjustment actuator  212  may be arranged along a vertical axis of the bezel  202  (e.g., on the right side of the toggle actuator  210 ), while the color adjustment actuator  206  may be arranged along a horizontal axis of the bezel  202  (e.g., below the toggle actuator  210 ). Indicia (e.g., text and/or icons) may be affixed (e.g., engraved in the surface of the bezel  202 ) next to the actuators to indicate the functional purposes of the actuators. 
     Either or both of the intensity adjustment actuator  212  and color adjustment actuator  214  may each include a rocker switch provided on the bezel (e.g., as shown in  FIG.  2   ). Actuations of upper and lower portions of the rocker switch of the intensity adjustment actuator  212  may cause the intensity of the light source to be raised and lowered, respectively, within an intensity range (e.g., from approximately 1% to approximately 100%). Actuations of side portions of the color adjustment actuator  214  may cause the color of the light source to be adjusted within a color range (e.g., between two color temperatures or across the entire color spectrum). 
     In addition, either or both of the intensity adjustment actuator  212  and color adjustment actuator  214  may include a sliding mechanism (e.g., a linear slider) provided on the bezel  202 . Manipulating the sliding mechanism of the intensity adjustment actuator  212  or the color adjustment actuator  214  may respectively change the intensity or color of the light source within an intensity range (e.g., from approximately 1% to approximately 100%) or a color range (e.g., the entire color spectrum). 
     Further, either or both of the intensity adjustment actuator  212  and/or the color adjustment actuator  214  may include a touch sensitive actuator (e.g., including a resistive or capacitive touch element) that may be responsive to a user&#39;s touch and capable of translating the touch into a control signal for setting the intensity and/or color of the light source. The touch sensitive actuator may include a plurality of force concentrators for actuating a resistive touch element. When a user applies a force on the resistive touch element (e.g., by pressing a finger against or moving a finger along the touch sensitive actuator), the force from the touch may be sensed and transmitted (e.g., by an input circuit such as the input circuit  135 ) to a control circuit (e.g., such as the control circuit  135 ) of the load control device. The control circuit may translate the input signal into an intensity or color control signal, which may be used to drive the connected light source within an intensity range (e.g., from approximately 1% to approximately 100%) or a color range (e.g., the entire color spectrum). An example of a load control device comprising a thin touch sensitive actuator is described in greater detail in commonly-assigned U.S. Pat. No. 7,791,595, issued Sep. 7, 2010, entitled TOUCH SCREEN ASSEMBLY FOR A LIGHTING CONTROL, the entire disclosure of which is hereby incorporated by reference. 
     The example user interface  200  may include a visual display (e.g., a linear array of visual indicators  216  as shown in  FIG.  2   ). The visual indicators  216  may operate as a feedback mechanism through which a user may learn about of an operational state of the connected light source, such as the on/off state, the intensity, and/or the color (e.g., the color temperature) of the light source. The visual indicators  216  may be illuminated by one or more light-emitting diodes (LEDs) arranged in a linear array and mounted behind the bezel  202 , for example. The visual indicators  216  may be illuminated when the light of the LEDs is emitted through a series of small openings in the bezel  202 . The number of LEDs that are illuminated may increase or decrease in accordance with the present intensity level of the light source (e.g., more illuminated LEDs may indicate higher light intensity). The color of the LEDs may be changed to reflect the color of the light source. As such, a user may be informed about the type of control presently being adjusted (e.g., intensity control or color control) and/or the amount of control (e.g., intensity or color) presently being applied to the light source. 
     The visual display may comprise a light bar (not shown). A portion or the entirety of the light bar may be illuminated (e.g., by one or more LEDs), and the length of the illuminated portion may provide an indication of the current intensity level of the light source. In some examples, when the toggle actuator  210  is actuated to turn the light source on, the light bar may be illuminated to quickly increase the length of the illuminated portion of the light bar to correspond to a previously selected intensity of the light source (e.g., the intensity of the light source before it was turned off, which may be stored in memory). When the toggle actuator  210  is actuated to turn the light source off, the length of the illuminated portion of the light bar may be decreased quickly to reflect the fact that the light source is being turned off. Instead of or in addition to changing the length of the illuminated portion of the light bar, the intensity of the light bar may be varied (e.g., as a function of the intensity of the light source) to reflect the intensity of the light source. The color of the illuminated portion may also be varied, e.g., to show the color of the light source. In some cases, the light bar may be provided on the intensity actuator and/or the color actuator. One or more aspects of the aforementioned feedback mechanism may be applied to all of the example user interfaces described herein. 
       FIG.  3    shows a front view of an example user interface  300  comprising a toggle actuator  310 , an elongated vertically-arranged actuator, such as an intensity adjustment actuator  312 , and/or an elongated horizontally-arranged actuator, such as a color adjustment actuator  314 . Any or all of the actuators  310 ,  312 ,  314  may be a touch sensitive actuator (e.g., including a resistive or capacitive touch element described herein). The intensity adjustment actuator  312  and the color adjustment actuator  314  may be provided on portions of a bezel  302  that may extend through respective openings  306 ,  308  in a faceplate  304 . The intensity adjustment actuator  312  may be longer than the color adjustment actuator  314 , and may occupy a more prominent location of the faceplate  304  than the color adjustment actuator  314 , for example to make the intensity control function of the user interface  300  more conspicuous and/or easier to access. For example, the intensity adjustment actuator  312  may be aligned with the first opening  306 , which may be elongated and arranged vertically (e.g., along a vertical axis of the faceplate  308 ) in the center of the faceplate  304 , while the color adjustment actuator  314  may be aligned with the second opening, which may be elongated (but shorter) and arranged horizontally (e.g., along a horizontal axis of the faceplate  308 ) towards the bottom of the faceplate  304 . 
     The intensity adjustment actuator  312  and color adjustment actuator  314  may be actuated to adjust the intensity or color (e.g., color temperature) of a connected light source, as described herein. The toggle actuator  310  may serve a number of purposes. For example, pressing the toggle actuator  310  may turn off the light source, or turn on the light source to a previously set intensity level (e.g., the intensity level of the light source before it was turned off). Visual feedback (e.g., such as the light bar described herein) may be provided (e.g., on the intensity adjustment actuator  312  and/or the color adjustment actuator  314 ) to indicate the intensity and/or color of the light source. The toggle actuator  310  may be illuminated (e.g., to different intensity and/or colors to indicate whether the light source is on or off. 
       FIG.  4 A  is a front view and  FIG.  4 B  is a right side view of an example user interface  400  comprising an elongated vertically-arranged actuator, such as an intensity adjustment slider  410  and an elongated horizontally-arranged actuator, such as a color adjustment slider  420 . The intensity adjustment slider  410  may comprise an intensity slider knob  412  provided in an intensity slider slot  414 , while the color adjustment slider  420  may comprise a color slider knob  422  provided in a color slider slot  424 . The intensity slider knob  412  may be configured to slide along the intensity slider slot  414  in, for example, a vertical direction, and the color slider knob  422  may be configured to slide along the color slider slot  424  in, for example, a horizontal direction. The intensity slider slot  414  and the color slider slot  424  may be aligned with respective openings  404 ,  406  in a faceplate  402 . In addition, the intensity slider slot  414  and the color slider slot  424  may be located adjacent (e.g., immediately adjacent) to each other within a single opening of a faceplate. The dimensions of the intensity adjustment slider  410  (e.g., the intensity slider knob  412  and the intensity slider slot  414 ) may be bigger than those of the color adjustment slider  420  (e.g., the color slider knob  422  and color adjustment slider slot  424 ) in order to make the intensity control function of the user interface  400  more conspicuous and/or easier to access than the color control function, for example. The intensity adjustment slider  410  (e.g., the intensity slider slot  424 ) may occupy a more prominent position on the faceplate  402  (e.g., the center of the faceplate) than the color adjustment slider  420  (e.g., the color slider slot  424 ), which may be located below the intensity slider slot  424 . 
     The intensity slider knob  412  and color slider knob  422  may slide along the intensity slider slot  414  and color slider slot  424 , to set the intensity or color (e.g., color temperature) of a connected light source, respectively. For example, the intensity of the light source may be raised in response to upward movements of the intensity slider knob  412  and lowered in response to downward movements of the intensity slider knob  412 . Sliding the intensity adjustment slider  402  all the way to one end of the intensity slider slot  406  (e.g., to the bottom of the intensity slider slot) may turn off the connected light source. In addition, the color temperature of the light source may be adjusted towards a first color temperature (e.g., a red-white color temperature) in response to movements of the color slider knob  422  in a first horizontal direction (e.g., to the left) and towards a second color temperature (e.g., a blue-white color temperature) in response to movements of the color slider knob  422  in a second horizontal direction (e.g., to the right). 
     The position of the intensity slider knob  412  in the intensity slider slot  414  may provide a visual indication of the intensity of the light source. The position of the color slider knob  422  in the color slider slot  424  may provide a visual indication of the color (e.g., color temperature) of the light source. In addition, visual feedback may be provided by illuminating one or more visual indicators (e.g., such as the visual indicators  216 ) to indicate the intensity and/or color of the light source. 
       FIG.  5 A  is a front view and  FIG.  5 B  is a right side view of an example user interface  500  comprising an elongated vertically-arranged actuator, such as an intensity adjustment slider  510 , and an elongated horizontally-arranged actuator, such as a color adjustment slider  520 , that is provided on the intensity adjustment slider  510 . The intensity adjustment slider  510  may comprise an intensity slider knob  512  that may be confined inside an intensity slider slot  514  (e.g., which may be aligned with an opening  504  in a faceplate  502 ), and may slide along the intensity slider slot  514 , for example in a vertical direction. The color adjustment slider  520  may comprise a color slider knob  522  that may be confined inside a color slider slot  524 , both of which may be provided on a front surface  516  of the intensity slider knob  512  of the intensity adjustment slider  510  (e.g., the color adjustment slider  520  may be located within the boundaries of the intensity adjustment slider  510 ). The color slider knob  522  may slide along the color slider slot  524 , for example in a direction orthogonal to the direction of movement of the intensity slider knob  512  (e.g., in a horizontal direction). As such, the intensity slider knob  512  of the intensity adjustment slider  510  may be more conspicuous and/or easier to access than the color slider knob  522  of the color adjustment slider  520 . In place of or in addition to a slider, the elongated horizontally-arranged actuator may comprise a lever that may pivot about an axis to allow the level to move in the horizontal direction to allow for adjustment of the color (e.g., the color temperature) of the light source. 
     As the user slides the intensity slider knob  512  or the color slider knob  522  along the intensity slider slot  514  or the color slider slot  524 , respectively, the intensity or color (e.g., color temperature) of a connected light source may be adjusted accordingly. For example, the intensity of the light source may be raised in response to upward movements of the intensity slider knob  512  and lowered in response to downward movements of the intensity slider knob  512 . The user may slide the intensity slider knob  512  all the way to one end of the intensity slider slot  514  (e.g., to the bottom of the intensity slider slot) to turn off the connected light source. In addition, the color temperature of the light source may be adjusted towards a first color temperature (e.g., a red-white color temperature) in response to movements of the color slider knob  522  in a first horizontal direction (e.g., to the left) and towards a second color temperature (e.g., a blue-white color temperature) in response to movements of the color slider knob  522  in a second horizontal direction (e.g., to the right). 
     The position of the intensity slider knob  512  in the intensity slider slot  514  may provide a visual indication of the intensity of the light source. The position of the color slider knob  522  in the color slider slot  524  may provide a visual indication of the color (e.g., color temperature) of the light source. In addition, visual feedback may be provided by illuminating one or more visual indicators (e.g., such as the visual indicators  210 ) to indicate the intensity and/or color of the light source. 
       FIG.  6 A  is a perspective view and  FIG.  6 B  is a front view of an example user interface  600  comprising a slider knob  610  (e.g., a rotating slider knob) for controlling the intensity and/or color (e.g., color temperature) of a light source. The slider knob  610  may be provided on a bezel  602  that may extend through an opening  606  in a faceplate  604 . The slider knob  610  may slide along a slider slot  612 . The slider knob  610  may be connected to an internal potentiometer (not shown) via a shaft (not shown) that may extend through the slider slot  612  (e.g., rotate with respect to the bezel  602 ). The slider knob  610  may be configured to rotate about the shaft that extends through the slider slot  612 . The light source may be turned on and off using a toggle button  614 . Alternatively or additionally, pushing the slider knob  610  towards the bezel  602  may turn the connected light source on or off. Alternatively or additionally, the light source may be turned off after its intensity is decreased to a minimum intensity (e.g., in response to moving the slider knob  610  all the way down the slider slot  612 ). 
     While the light source is on, a user may slide the slider knob  610  along the slider slot  612  to adjust the intensity of the light source and may rotate the slider knob  610  to adjust the color of the light source. Alternatively or additionally, the user may rotate the slider knob  610  to adjust the intensity of the light source and may slide the slider knob  610  along the slider slot  612  to adjust the color of the light source. The slider knob  610  may freely-rotate around the shaft to allow the user to continuously adjust the intensity and/or color of the light source by rotating the slider knob  610 . In addition, the slider knob  610  may be configured to be held in a plurality of detents to allow the slider knob to hold in different positions so that the intensity and/or color of the light source may be adjusted by preset amounts. 
     Feedback may be provided on the user interface  600  to indicate the type of control being adjusted and/or amount of control being applied. The position of the slider knob  610  along the length of the slider slot  612  may represent the intensity of the lighting load. In addition, the user interface  600  may comprise a visual indicator  616  that may be illuminated (e.g., by one or more LEDs) to different colors and/or intensity to inform the user about the color, intensity, or state (e.g., on or off) of the light source. The visual indicator  616  may comprise a light pipe (e.g., a translucent light pipe) that may be connected to the toggle actuator  614  (e.g., as shown in  FIGS.  6 A and  6 B ) and may be illuminated, e.g., by the LEDs. Visual feedback may also be provided in other areas of the user interface  600  (e.g., on the bezel  604  or the faceplate  606 ) to indicate the intensity and/or color of the light source. 
       FIGS.  7 A and  7 B  are front views of another example user interface  700  comprising a slider knob  710  (e.g., a rotating slider knob) for controlling the intensity and/or color of a light source. The slider knob  710  may be provided on a bezel  702  that may extend through an opening  706  of a faceplate  704 . The slider knob  710  may slide along a slider slot  712 . The slider knob  710  may be connected to an internal potentiometer (not shown) via a shaft (not shown) that may extend through the slider slot  712 . The slider knob  710  may be configured to rotate about the shaft that extends through the slider slot  712  (e.g., rotate with respect to the bezel  702 ). 
     Rotating the slider knob  710  into different angular positions (e.g., different orientations) may set a control mode of the user interface  700  (e.g., between an intensity control mode and a color control mode). Sliding the slider knob  710  along the slider slot  712  may adjust (e.g., set a specific value for) the intensity or color of the light source depending upon the angular position of the slider knob  710 . Indicia (e.g., text and/or icons) may be provided on the slider knob  710  to help a user orient the slider knob  710  to select the control mode. For example, to put the user interface  700  into the intensity control mode, the user may turn the slider knob  710  into a position at which a sunburst icon and a circle icon on the slider knob  710  are aligned vertically (e.g., a first angular position). To put the user interface  700  into the color control mode, the user may turn the slider knob  710  into a position at which two hatched icons (e.g., representing different colors) on the slider knob  710  are aligned vertically (e.g., a second angular position). The slider knob  710  may be configured to be held in the first and second angular positions by one or more detents. The user interface  700  may be configured to remain in the previous mode until the slider knob  710  is fully rotated into one of the first or second angular positions. Depending upon the angular position of the slider knob  710  and thus the selected control mode, the position of the slider knob  710  along the length of the slider slot  712  may indicate the intensity or color to which the light source is being controlled. 
     Visual feedback may be provided on the bezel  702  or the faceplate  704  to inform a user about the intensity and/or color of the light source. Additionally or alternatively, the surface of the slider knob  710  or the slider slot  712  may be illuminated (e.g., by one or more LEDs) to provide the feedback. The user interface  700  may further comprise a visual indicator (not shown) for providing the feedback (e.g., such as the visual indicator  616  of the user interface  600  shown in  FIGS.  6 A and  6 B ). In addition, the position of the slider knob  710  along the length of the slider slot  712  may provide an indication of the intensity or color of the light source depending upon the selected control mode. 
     When the slider knob  710  is rotated to change between the control modes, the intensity or color of the light source may not be immediately controlled to the intensity or color indicated by the position of the slider knob  710  along the length of the slider slot  712  in the newly selected mode. For example, after a rotation of the slider knob  710 , the user interface  700  may operate in a “demo” mode during which the light source may not be controlled according to the position of the slider knob  710  along the length of the slide slot  712 . In the demo mode, visual feedback may be provided on the user interface of the presently-selected intensity or color. For example, if the slider knob  710  is rotated to change from the intensity control mode to the color control mode, a portion of the user interface may be illuminated to provide feedback of a presently selected color when in the color control mode. In addition, movements of the slider knob  710  along the slider slot  712  may not adjust the intensity or color of the controlled light source in the demo mode (e.g., the present intensity and/or color of the light source may be maintained). During the demo mode, movements of the slider knob  710  may cause the visual feedback provided on the user interface  700  to be adjusted while the intensity or color of the light source may remain constant. 
     To adjust the intensity or color of the light source after the slider knob  710  is rotated to change between control modes, the slider  710  may be pushed in towards the bezel  702  (e.g., momentarily actuated) to change the user interface to an “active-control” mode. In the active-control mode, sliding the slider knob  710  along the slider slot  712  may adjust the intensity or color of the light source depending upon the angular position of the slider knob  710 . 
     Sliding the slider knob  710  all the way to the bottom of the slider slot  708  may turn off the light source. Pushing the slider knob  710  in towards the bezel  702  may toggle the light source on and off. The user interface  700  may further comprise a toggle actuator (not shown) for toggling the light source on and off (e.g., such as the toggle actuator  614  of the user interface  600  shown in  FIGS.  6 A and  6 B ). 
       FIGS.  8 A and  8 B  are front views of another example user interface  800  comprising a slider knob  810  and one or more actuators (e.g., such as one or more buttons  814 ) located on the slider knob. The slider knob  810  may slide along a slider slot  812  that may be provided on a bezel  802  and be accessible through an opening  806  in a faceplate  804 . The slider knob  810  may be connected to an internal potentiometer (not shown) via a shaft (not shown) that may extend through the slider slot  812 . The slider knob  810  may be configured to rotate about the shaft that extends through the slider slot  812 . When the slider knob  810  is rotated to a first angular position (e.g., a horizontal orientation as shown in  FIG.  8 A ), sliding the slider knob  810  along the slider slot  812  (e.g., raising and lowering the slider knob  810 ) may adjust the intensity of the connected light source, while pressing the buttons  814  may adjust the color (e.g., the color temperature) of the light source. When the slider knob  810  is rotated to a second angular position (e.g., a vertical orientation as shown in  FIG.  8 B ), sliding the slider knob  810  along the slider slot  812  (e.g., raising and lowering the slider knob  810 ) may apply “dim-to-warm” control over a light source. While the user interface  800  is in the “dim-to-warm” control mode, both the intensity and color (e.g., color temperature) of the light source may be controlled by the movement of the slider knob  810  along the slider slot  812  according to a “dim-to-warm” dimming curve. While in the “dim-to-warm” control mode, the one or more buttons  814  may be temporarily disabled from controlling the color or intensity of the light source. The slider knob  810  may be configured to be held in the first and second angular positions by one or more detents. 
     Visual feedback/indication may be provided on the bezel  802  or the faceplate  804  to inform a user about the intensity and/or color of the light source. Additionally or alternatively, the surface of the slider knob  810  or the slider slot  812  may be illuminated (e.g., by one or more LEDs) to provide the feedback. The user interface  800  may further comprise a visual indicator (not shown) for providing the feedback (e.g., such as the visual indicator  616  of the user interface  600  shown in  FIGS.  6 A and  6 B ). 
       FIG.  9    shows a front view of another example user interface  900  in which two sets of controls may be used to adjust the intensity and color of a connected light source separately. A first set of controls may include a toggle actuator  902  and an intensity adjustment actuator  904  (e.g., a slide dimmer). Either or both of the toggle actuator  902  and intensity adjustment actuator  904  may be provided on a bezel  906 , and may extend through an opening  908  in a faceplate  910 . Pressing the toggle actuator  902  may turn the connected light source on or off. When the light source is on, the intensity adjustment actuator  904  may be manipulated to set the intensity of the light source to a specific value within a range (e.g., from approximately 1% to approximately 100%). A second set of controls of the user interface  900  may include one or more actuators (e.g., one or more buttons) for adjusting the color of the light source. For example, a set of buttons  912  may be provided on the bezel  906  and be accessible to the users through the opening  908  of the faceplate  910 . One of the buttons may be used to increase the color temperature of the light source while another may be used to decrease the color temperature of the light source. Indicia (e.g., such as text or icons) may be affixed to the user interface  900  to indicate the functional purposes of the controls. Feedback about the intensity and/or color of the light source may be provided. For example, the buttons  912  may be illuminated to reflect the color of the light source as those buttons are actuated. Additionally or alternatively, a visual display  914  (e.g., such as the visual indicators  216 ) may be provided on the user interface  900  to indicate the intensity and/or color of the light source. 
     As described herein, the intensity and color of a light source may be set via a common actuator, which may be configured to operate in an intensity control mode or a color control mode. The color control mode may further comprise a color temperature control mode and a red-green-blue RGB color control mode (e.g., a full color control mode). The control mode of the actuator may be set prior to using the actuator to select a particular intensity level or color for the light source.  FIG.  10    shows a perspective view of an example user interface  100  that includes an actuator  1002  and a control mode selector  1004 . The actuator  1002  and control mode selector  1004  may be provided on a bezel (not shown) and be aligned with respective openings in a faceplate  1006 . The actuator  1002  may include a touch sensitive element (e.g., such as a resistive or capacitive touch element), which may be used to set a value towards which the intensity level or color of the light source may be controlled. The control mode selector  1004  may include one or more buttons for placing the actuator  1002  into various control modes. The buttons may be “hard” buttons (e.g., physical buttons) or “soft” buttons (e.g., touch sensitive elements that may emulate the functionality of physical buttons). Indicia (e.g., text or icons) may be affixed to the buttons to indicate the respective control modes associated with the buttons. For instance, “Brightness” may indicate that the corresponding button may be used to activate intensity control, “Control Temp” may indicate that the corresponding button may be used to activate color temperature control, “Full Color” may indicate that the corresponding button may be used to activate the RGB color control mode (e.g., selection of colors along a predetermined trajectory of colors using the actuator  1002 ), and “Warm Dim” may indicate that the corresponding button may be used to activate dim-to-warm control (e.g., both the intensity and color of the light source may be controlled via the actuator  1002 ). The default control mode of the actuator  1002  may be set to “Brightness” or intensity control. As such, the user may manipulate the actuator  1002  to adjust the intensity of the light source without having to press the “Brightness” button first. For example, the user may press the actuator  1002  to turn the light source on (e.g., to an intensity level associated with the position of the user&#39;s press). The user may manipulate the actuator  1002  to turn the light source off (e.g., by swiping a finger down the surface of the actuator  1002 ). 
       FIG.  11    shows a front view of an example user interface  1100  that includes a mode-selection button  1102  for setting the control mode of an actuator  1104 . The mode-selection button  1102  may be a “hard” button (e.g., a physical button) or a “soft” button (e.g., a touch sensitive element emulating the functionality of a physical button). A user may actuate the mode-selection button  1102  (e.g., via a quick tap or click) to switch the control mode of the actuator  1104  among several options including, for example, “intensity” control, “color” control, and “dim-to-warm” control (e.g., both the intensity and color of the light source may be controlled via the actuator  1104 ) of a light source. The user may also use the mode-selection button  1102  to turn the light source on and off. For example, the user may press and hold the mode-selection button  1102  for a brief period of time (e.g., as opposed to a quick tap or click of the button) to turn off the light source. From an “off” state, the light source may be turned back on (e.g., to previously set intensity and/or color) when the user presses the mode-selection button  1102  again. Upon entering the “on” state, the actuator  1104  may enter the “intensity” control mode by default. An area  1108  next to the mode-selection button  1102  may be illuminated to (e.g., in response to the button being pressed) to indicate the control mode of the actuator  1104  (e.g., “intensity,” “color,” or “warm dim” control), or the on/off state (e.g., “ON” or “OFF”) of the light source. Once a control mode has been selected, the actuator  1104  may be manipulated to select a specific value towards which the intensity level and/or color of the light source may be adjusted. The actuator  1104  may include a touch sensitive element (e.g., such as a capacitive touch element). As described herein, a user may swipe a finger across the surface of the touch sensitive element to set a target intensity and/or color for the light source. Visual feedback/indication (e.g., such as the LED light bar described herein) may be provided (e.g., on the actuator  1104 ) to indicate the intensity and/or color of the light source. 
       FIG.  12    shows a front view of an example user interface  1200  that utilizes a mode-selection slider  1202  to set the control mode of an actuator  1204 . The mode-selection slider  1202  (e.g., a horizontal slider) may be accessible through an opening in a faceplate  1206 . The mode-selection slider  1202  may be used to select a control mode for the actuator  1204  from a plurality of options including, for example, “Intensity Control,” “Color Control,” and “Warm Dim Control” (e.g., both the intensity and color of the light source may be controlled via the actuator  1204 ). Indicia  1208  (e.g., text or icons) may be provided in the vicinity of the mode-selection slider  1202  to indicate the available options. The actuator  1204  may comprise a slide actuator or a touch sensitive element (e.g., such as a resistive or capacitive touch element). The actuator  1204  may be manipulated to set a specific value towards which the intensity and/or color of the light source may be adjusted (e.g., as described herein). Visual feedback/indication (e.g., such as the visual indicators  216 ) may be provided (e.g., on the actuator  1204  or in another area of the faceplate  1206 ) to indicate the intensity and/or color of the light source. 
       FIG.  13    is a flowchart of an example control procedure  1300  that may be executed by a control circuit of a control device (e.g., the control circuit  135  of the control module  130 ) to control a lighting load in response to inputs received via a user interface (e.g., the user interface  200  shown in  FIG.  2    and/or the user interface  300  shown in  FIG.  3   ). For example, the control circuit may be configured to adjust the intensity of the lighting load between a minimum intensity level and a maximum intensity level, and adjust the color temperature of the lighting load between a warm-white color temperature and a cool-white color temperature. The control circuit may execute the control procedure  1300  in response to an actuation of an actuator of the user interface at  1310 . If a toggle actuator (e.g., the toggle actuator  210 ) is being actuated at  1312  and the lighting load is presently on at  1314 , the control circuit may turn off the lighting load at  1316  (e.g., by rendering the controllably conductive device  134  non-conductive). If the toggle actuator is being actuated at  1312  and the lighting load is presently off at  1314 , the control circuit may turn on the lighting load at  1318 . If an intensity adjustment actuator (e.g., the intensity adjustment actuator  212 ) is being actuated at  1320  and the actuation indicates a raise command at  1322  (e.g., the upper portion of the intensity adjustment actuator  212  is being actuated), the control circuit may increase the intensity of the lighting load at  1324 . If the intensity adjustment actuator is being actuated at  1320  and the actuation indicates a lower command at  1322  (e.g., the lower portion of the intensity adjustment actuator  212  is being actuated), the control circuit may decrease the intensity of the lighting load at  1326 . 
     If a color adjustment actuator (e.g., the color adjustment actuator  214 ) is being actuated at  1328  and the actuation indicates a warmer color temperature at  1330  (e.g., the left portion of the color adjustment actuator  214  is being actuated), the control circuit may adjust the color temperature of the lighting load towards the warm-white color temperature at  1332 . If the color adjustment actuator is being actuated at  1328  and the actuation indicates a cooler color temperature at  1330  (e.g., the right portion of the color adjustment actuator  214  is being actuated), the control circuit may adjust the color temperature of the lighting load towards the cool-white color temperature at  1334 . After the lighting load has been controlled, the control circuit may control the visual indicators to reflect the change sin the intensity and/or color temperature of the lighting load at  1336 , before the control procedure exits. 
       FIG.  14    is a flowchart of an example control procedure  1400  that may be executed by a control circuit of a control device (e.g., the control circuit  135  of the control module  130 ) to control a lighting load in response to inputs received via a user interface (e.g., the user interface  600  shown in  FIGS.  6 A and  6 B ). For example, the user interface may comprise a slider knob (e.g., the slider knob  610 ) that may be slid through a slider slot (e.g., the slider slot  612 ) and may be rotated. The control circuit may execute the control procedure  1400  in response to actuation of the slider knob at  1410 . If the actuation is a sliding movement of the slider knob through the slider slot at  1412 , the control circuit may adjust the intensity of the lighting load based on the position of the slider knob along the length of the slider slot at  1414 . If the actuation is rotation of the slider knob at  1416 , the control circuit may adjust the color (e.g., color temperature) of the lighting load based on the angular position of the slider knob at  1418 . If the actuation is a continued actuation at  1420 , the control circuit may continue to adjust the intensity and/or color temperature of the lighting load at  1414  and  1418 , respectively. If the actuation is complete at  1420 , the control procedure  1400  may end. 
       FIG.  15    is a flowchart of an example control procedure  1500  that may be executed by a control circuit of a control device (e.g., the control circuit  135  of the control module  130 ) to control a lighting load in response to inputs received via a user interface (e.g., the user interface  700  shown in  FIGS.  7 A and  7 B ). For example, the user interface may comprise a slider knob (e.g., the slider knob  710 ) that may be slid through a slider slot (e.g., the slider slot  712 ) and may be rotated. The control circuit may execute the control procedure  1500  in response to actuation of the slider knob at  1510 . If the actuation is rotation of the slider knob at  1512 , the control circuit may adjust a control mode at  1514 , for example, between an intensity control mode and a color control mode based on the angular position of the slider knob. If the actuation is sliding movement of the slider knob through the slider slot at  1516 , the control circuit may update visual feedback provided by the user interface at  1518 , for example, to provide visual feedback of the intensity and/or color temperature of the lighting load based on the position of the slider knob along the length of the slider slot. If the slider knob has been pushed in (e.g., momentarily actuated) at least once since the control mode was last changed at  1520  and the intensity control mode is selected at  1522  (e.g., the slider knob is rotated as shown in  FIG.  7 A ), the control circuit may adjust the intensity of the lighting load based on the position of the slider knob along the length of the slider slot at  1524 . If the slider knob has been pushed in at least once since the control mode was last changed at  1520  and the color control mode is selected at  1522  (e.g., the slider knob is rotated as shown in  FIG.  7 B  and the intensity control mode is not selected), the control circuit may adjust the color temperature of the lighting load based on the position of the slider knob along the length of the slider slot at  1526 . If the slider knob has not been pushed in at least once since the control mode was last changed at  1520 , the control circuit may not adjust the intensity and/or color temperature of the lighting load based on the position of the slider knob along the length of the slider slot (e.g., may operate in a demo mode in which the present intensity and/or color temperature of the lighting load may be maintained). If the actuation is a continued actuation at  1528 , the control procedure  1500  may loop around to process the actuation of the slider knob again. If the actuation is complete at  1528 , the control procedure  1500  may end. 
       FIGS.  16 A and  16 B  are flowcharts of example control procedures  1600 ,  1630  that may be executed by a control circuit of a control device (e.g., the control circuit  135  of the control module  130 ) to control a lighting load in response to inputs received via a user interface (e.g., the user interface  800  shown in  FIGS.  8 A and  8 B ). For example, the user interface may comprise a slider knob (e.g., the slider knob  810 ) that may be slid through a slider slot (e.g., the slider slot  812 ) and may be rotated, and one or more buttons (e.g., buttons  814 ). The control circuit may be configured to adjust the intensity of the lighting load between a minimum intensity level and a maximum intensity level, and adjust the color temperature of the lighting load between a warm-white color temperature and a cool-white color temperature. 
     As shown in  FIG.  16 A , the control circuit may execute the first control procedure  1600  in response to actuation of the slider knob at  1610 . If the actuation is rotation of the slider knob at  1612 , the control circuit may adjust a control mode at  1614 , for example, between first and second modes based on the angular position of the slider knob. If the actuation is sliding movement of the slider knob through the slider slot at  1616  and the first mode is selected at  1618  (e.g., the slider knob is rotated as shown in  FIG.  8 A ), the control circuit may adjust the intensity of the lighting load based on the position of the slider knob along the length of the slider slot at  1620 . If the actuation is sliding movement of the slider knob through the slider slot at  1616  and the second mode is selected at  1618  (e.g., the slider knob is rotated as shown in  FIG.  8 B ), the control circuit may adjust both the intensity and the color temperature of the lighting load based on a dim-to-warm dimming curve and the position of the slider knob along the length of the slider slot at  1622 . If the actuation is a continued actuation at  1624 , the first control procedure  1600  may loop around to process the actuation of the slider knob again. If the actuation is complete at  1624 , the first control procedure  1600  may end. 
     Turning to  FIG.  16 B , the control circuit may execute the second control procedure  1630  in response to an actuation of one of the buttons at  1640 . If the first mode is selected at  1642  and one of buttons was actuated to adjust the color temperature to be warmer (e.g., a “warm-white” button or a “warmer” button was actuated) at  1644 , the control circuit may adjust the color temperature of the lighting load towards the warm-white color temperature at  1646 . If one of buttons was actuated to adjust the color temperature to be cooler (e.g., a “cool-white” button or a “cooler” button was actuated) at  1648 , the control circuit may adjust the color temperature of the lighting load towards the cool-white color temperature at  1650 . If the actuation is a continued actuation at  1652 , the control circuit adjust the color temperature again at  1646  and  1650 . If the actuation is complete at  1652 , the second control procedure  1630  may end. If the first mode is not selected at  1642 , the second control procedure  1630  may end without adjusting the color temperature of the lighting load. 
     Although the examples provided herein are described with reference to one or more light sources, the examples may be applied to other electrical loads. For example, one or more of the embodiments described herein may be used to control a variety of electrical load types, such as, for example, a motorized window treatment or a projection screen, a motorized interior or exterior shutters, a heating, ventilation, and air conditioning (HVAC) system, an air conditioner, a compressor, a humidity control unit, a dehumidifier, a water heater, a pool pump, a refrigerator, a freezer, a television or computer monitor, a power supply, an audio system or amplifier, a generator, an electric charger, such as an electric vehicle charger, and an alternative energy controller (e.g., a solar, wind, or thermal energy controller). A single control circuit may be coupled to and/or adapted to control multiple types of electrical loads in a load control system.