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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 control the color temperature of specific luminaire groups. You will be able to adjust the color temperature curve and the brightness level during cerain parts of the day.

Import the ready made flow using the instructions here: Importing a Node-RED flow or follow the instructions below.

[{"id":"9c61868e.cde0a8","type":"es cct","z":"d34d8c92.282a9","name":"","startTime":"05:00","finishTime":"23:30","colorLevels":[3500,4997,5446,5006,3500],"colorLabels":["05:00","08:12","13:31","18:47","23:30"],"brightnessLevels":[100,48,48,49,100],"brightnessLabels":["05:00","08:55","12:59","19:34","23:30"],"sendFrequencyInMinutes":1,"cctMin":3500,"cctMax":5500,"selectedVertex":"B827EB6C2118","x":280,"y":320,"wires":[["e625e1c1.50eb3"],["5b05c0e8.9d6a9"]]}]

Step-by-step instructions

  1. 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; you can verify this information in the Vertex UI. 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.

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.

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 that moderates the frequency of sending the settings command to luminaires.

Select "Done".

If you want to change chart of color/brightness, click “Done” after modification.

The “Confirm” button resets charts to default.

  1. Open the first vertex action node. It will control the color temperature.

Set the settings as shown below. Select the correct luminaire group that has Dynawhite luminaires.

  1. 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!

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