Control Your Tunable Bulbs Temperature

Cupertino, August 15, 2019
If you've just began making your home' Smart' on your trip, you may be conscious of smart bulbs, and even intelligent bulbs, but you may not be conscious of what's known as' tunable white' intelligent bulbs, or as Philips Hue calls them' White Ambiance.' These are fundamentally white intelligent bulbs that can be' tuned' to distinct color levels, ranging from' cool' white for the daytime or helping in concentration, if you are working, to' hot' white, with a more orange tinted light, to assist you relax in the morning.

If you have one of these, it's also entirely possible that you've never been able to take advantage of this extra functionality, mostly because changing the lights from one ' temperature' to another usually depends on changing them through the app, with the result that you're never bothering and just sticking to the one temperature.

However, you can get the lights on at the suitable color temperature whenever you switch them on with a straightforward bit of one-off planning and a few pieces and automations. I will set some fundamental guidelines for this tutorial when I say the' suitable' temperature, so:

  • Cool white from 7am – 2pm
  • Mid-white from 2pm – 7pm
  • Warm white from 7pm – 7am the next day

You can choose these moments for yourself, of course, so feel free to change them in the automations and scenes that I'm going to demonstrate you how to produce them. You'll need at least one tunable white Smart Bulb (I'm using two of the Vocolinc L2 Tunable White intelligent bulbs), a programmable wireless switch (I'm using the Terncy In-wall switch which also has two programmable switches), and the free downloadable Eve for HomeKit app.

One final note: There's another, possibly simpler way to do this, but I don't think it's as great as a solution as the one I'm displaying today, but for the sake of reasoning I'm going to add the easy guide to the end of this article.


The first thing we need to do is set up three separate scenes setting the different color temperatures that I'm rapidly creating in the normal Home app ;

  • In the Apple Home app, click on the plus symbol in the top right corner and select ‘add scene’
  • Click on ‘custom’
  • Select the devices you wish to be included in the scene – I’m selecting two Vocolinc L2 tunable White smart bulbs
  • Once you’ve selected your devices, click on done
  • long press on each of the bulbs and set the colour temperature and brightness of each bulb, making sure each bulb is set the same
  • Make sure the bulbs are set to be ON – which they will be if you’ve set the brightness levels anyway

Now I've developed a scene for the bulbs to be set to Cool White, so you just repeat it for another two (or more) scenes–one for Medium White and one for Warm White. Once they've finished, you should generate a simpler scene with the lights set to off. The brightness and temperature of course do not apply as they are set to be off.


We are now moving to the Eve for HomeKit app, as we simply don't have the ability to produce automations that have' circumstances' like the present Home app. In the Eve app, when it comes to automations, things are a little different. These are in the Scenes tab and for some reason are labeled' Rules,' but this is still where you generate your automations.

I basically want it for these automations so that when the button is pushed it turns on the lights, but depending on the moment of day one of the three automations I developed in the past chapter will be selected. Additionally, only if the status of one of the lights is' off' will these automations operate.

  • Click on the Scenes tab at the bottom, then click on the Rules tab at the top.
  • Scroll to the bottom of this page and click on ‘Add Rule’
  • On the next screen, you get the basic structure for your automation laid out – Triggers > Conditions > Scenes. Click Next
  • You then add your Trigger device – which in this case will be a switch that turns your lights on
  • Click on ‘Other Value’ then select the room where the switch is located.
  • scroll through the next screen until you find your switch
  • Toggle it on, and select either Single, Double or Long press. I’ve selected a single press for this example
  • Click Add, and you’ll return the Triggers screen, which should now show the trigger device you selected
  • Click Next and you get to the Conditions section, which is where this app is more useful than Home.
  • For this automation I want it to only work between certain hours, so I add two ‘time-based’ conditions – after 0700hrs and before 1300hrs (7am – 1pm)
  • Once you’ve added your two time conditions, you can go ahead and add a Value condition, which in this case will be the status of (one of) the light(s).
  • I’ve got two bulbs in the scenes created, but I only really need to check the status of one of these bulbs for this automation.
  • Find one of the bulbs and set the status so that its power condition is toggled on, and the condition equals ‘off’

You're left with three distinct conditions once you've added that – the bulb's power status should be off, and the time should be after 7 am and before 1 pm. If these requirements are met when pressing the button, the scene will be initiated, which we will get to next.

  • Click Next and you then choose your scene
  • As this Rule/Automation is set to work from 7am until 1am, I want the bulbs to be set to cool white, so I’m going to choose the ‘Vocolinc Cool’ scene I created earlier in the Home app
  • Once you’ve chosen the scene you want, ensuring the tick mark appears to show it has been selected, Click Next
  • You finally get to name the Rule/Automation – and in this case, I’ve named it to reflect both the scene and the time – Vocolinc Cool 0700 1300

As with the scenes you created earlier, you repeat the above steps in the Eve app for two more Rules / Automations, but change the time conditions–in my case, the medium white scene would operate between 1 pm–6 pm, with the warm white scene working from 6 pm–7 am, although with this third Rule / Automation, you only need one time condition–After 6 pm, as the bulbs will work. Make sure that each successive rule / automation has a name that follows the same already defined convention to make things simpler to trace if you need to modify anything later.

The final portion is much simpler, and it was linked to why in the other Rules / Automations you need a condition that checks the energy status of the bulb(s).

  • Select the same switch you chose for the previous Rules/Automations
  • The only condition you need to set is for the bulb – who’s status you set as a condition before – to be on. If the bulb is ON, then this automation will turn the bulbs OFF
  • Choose the Vocolinc Off if On scene and name the Rule/Automation

This Rule/Automation ultimately allows you to use just one action and one switch for both on and off functions. In conjunction with the other Rules/Automations, It works like this;

  • The button is pressed once
  • is the bulb off or on? Off
  • What time is it? 0900
  • Trigger Vocolinc Cool 0700 1300 Scene

– or –

  • The button is pressed once
  • is the bulb off or on? On
  • Trigger Vocolinc Off if On Scene

There's one issue you'll almost certainly encounter with this method at some point, and that's if your lights are already on, and they're set to say, medium white, they won't change to warm white at 6 pm, unless you go and turn the lights on again. To solve this, you merely need to produce three tiny automations that transform the lamps at the correct moment to the correct color temperature, but only when the lights are already on. You should be able to figure it out after going through the above components, but I'm going to go through it anyway.

Since you've set up scenes for the three different color temperatures, you don't need to produce fresh scenes, just reuse the same scenes in fresh automations:

  • Go into the Eve app, and as before, create a new Rule
  • For the Trigger, use ‘Time of Day’
  • Select the same time that the particular Scene will start…
  • My Cool white scene will start at 7am, so I select 7am too. Click Next
  • Add a Value Condition, and select one of the bulbs that will be used in the corresponding scene
  • Set the power toggle to ‘On’ and condition should equal ‘On’. Click Add
  • Then Click next and select the corresponding scene, and finally name the Rule/Automation

That's it. So when 7 am arrives and the light is not on, the lights will not come on, but when someone presses the button and turns the light on it will be set to cool white. If someone turns the lights on before 7 am (which would mean they would be set to warm white from the last automation the night before), then this other automation kicks in and changes the lights to cool white at 7 am when 7 am comes around.

You can't normally generate automations involving switches in the Home app, as the only choice is to go into the switch environments and select a scene for each sort of press to be triggered. For this reason, these automations will not appear in the Home app's Automations list, so any adjustments that need to be made in the Eve app should be made, but apart from changing the times or disabling the automations, these automations should not be touched again.

If all this seems to be a bit complicated, there is a way to accomplish much simpler outcomes. Simply turn the lamps on for 1 minute before switching them off again and set the appropriate color temperature in the process of switching them on. So you could have the lights turn on in cool white for 1 minute at 7 am, then turn on again in medium white for 1 minute at 1 pm, and finally turn on again in warm white for 1 minute at 6 pm, before switching off again.

  • Select the Automation tab in the Home app, then click on the Plus icon
  • Choose ‘A Time of Day Occurs’
  • Select the time you want your lights to come on, click next
  • Choose the lights you want to be controlled
  • set the brightness level and the colour temperature for the bulbs
  • Select the amount of time they will be on for before the turn off again – the minimum is 1 minute in the Home app

For each time you want the bulbs to change, you then repeat this. The only reason I'm not as keen on this is that if the lights are off when someone is in the room, it can be a bit of a surprise if they don't know about these automations. Furthermore, if the lights are already on while somebody may be working, they will go off after a minute, which means that the individual will have to switch them on again.

This tutorial might sound like a lot of effort, but it just needs to be done once and you don't have to worry about it again. If amyone has a more streamlined alternative, please let me know in the section below on remarks.

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