Human-Centric Lighting (HCL) is an approach to lighting design that focuses on enhancing the well-being, health, and performance of individuals by taking into account the physiological and psychological aspects of human beings and their interaction with light. It can give an energy boost or it can have a calming effect. HCL aims to create lighting environments that are tailored to the natural patterns of human circadian rhythms and visual comfort.
Using the Node-RED you can
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control the color temperature of specific luminaire groups
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. You will be able to adjust the color temperature curve and
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the brightness level
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Instructions
Find the ES CCT control, Vertex action, and Vertex cluster node in the palette on the left side of the Node-RED.
Drag the nodes and drop them onto the workspace.
Go to the ES CCT control node. You will see the configuration screen of this node.
Enter the start time and the finish time (greater than the start time).
Choose time unit.
Select the Set Time button.
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7. Adjust Colour Temperature function. Add multiple points to your function.
8. Adjust the Brightness function.
9. Moderate Color and Brightness functions by adding multiple points:
- to add a new point, press ALT and then click on the desired place on the graph.
- to remove the point from the graph you need to click it while holding SHIFT.
- to move the point on the graph you can either drag it to the desired place or click it with the CTRL key and select time and value in the prompt window (see picture below).
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11. Select "Done".
12. Copy and paste another vertex action node. You will need two nodes: the upper one for controlling the color temperature and the second one for the brightness value.
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14. In the second vertex action node, select the settings as below.
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15. Link all nodes together and select the Deploy button.
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| Info |
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For the luminaires designed in CIRCADIAN technology, the second function (brightness) will control the amount of blue light. For Dynawhite technology, the overall brightness of the luminaire will be controlled. |
Flow
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| language | json |
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during certain parts of the day.
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Import the ready made flow using the instructions here: Importing a Node-RED flow or follow the instructions below. |
| Code Block |
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[{"id":" |
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9c61868e. |
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cde0a8","type":"es cct","z":" |
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d34d8c92. |
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282a9","name":""," |
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startTime": |
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"05:00"," |
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finishTime":" |
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23: |
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30"," |
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colorLevels": |
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[3500,4997,5446,5006,3500]," |
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colorLabels":[" |
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05:00","08 |
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: |
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12 |
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","13: |
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31"," |
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18: |
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47"," |
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23: |
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30"]," |
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brightnessLevels":[ |
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100, |
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48, |
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48, |
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49, |
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100]," |
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brightnessLabels":[" |
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05:00"," |
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08: |
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55"," |
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12: |
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59"," |
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19: |
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34"," |
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23:30"],"sendFrequencyInMinutes":1,"cctMin":3500,"cctMax":5500,"selectedVertex":"B827EB6C2118","x": |
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280,"y": |
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320,"wires":[["e625e1c1.50eb3"],["5b05c0e8.9d6a9"]]} |
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] |
Step-by-step instructions
Find the following nodes in the palette on the left side of the Node-RED, drag them to your workspace and connect them as shown.
ES CCT control
Vertex action x2
Vertex cluster
2. Go to the ES CCT control node. You will see the configuration screen of this node. Input the start time and end time, ensuring that the end time is later than the start time. Specify the Minimum CCT and Maximum CCT values, typically ranging from 2700 K to 6500 K. However, note that the range may vary slightly for different LED drivers. In this example the driver's range is between 3500K and 5500K. Select the Confirm button to save parameters.
Select the message source, it will be one of the Vertexes.
| Info |
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We recommend making one central engine for HCL (choosing one Vertex for all HCL control) to avoid chatter in the system and to make adjustments easier in the future. |
.png?version=1&modificationDate=1700648112395&cacheVersion=1&api=v2&width=439)
Adjust the Color Temperature and Brightness functions. Add multiple points to your function:
to add a new point, press ALT and then click on the chosen place on the graph
to remove the point from the graph, click it while holding SHIFT
to move the point on the graph, drag it to the chosen place
Set Message interval for the frequency of CCT settings command sent to the luminaire groups
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If you want to change chart of color/brightness, click “Done” after modification. The “Confirm” button resets charts to default. |
Open the first vertex actionnode. It will control the color temperature.
Set the settings as shown below. Select the correct luminaire group that has Dynawhite luminaires.
Open the second vertex action node, set the settings as shown below. This node will control the brightness value.
Do not forget to click Done and Deploy!