By default, a Philips Hue light is set to switch on to a warm white colour. This can sometimes be an issue, for example, if there’s a power cut at night the last thing you want is for all of your lights to come on when power resumes.
This is why Philips introduced power-on behaviour in 2018 to address this issue.
Power-on behaviour defines what the light bulbs do when first powered on. You can set the colour, colour temperature, and intensity of each light bulb. Alternatively, you can set the bulb to ‘power loss recovery’ which will return it to the previous settings.
The power-on behaviour is stored on the bulb itself which allows it to resume the same settings straight away, rather than connecting to the Hue Bridge.
In this guide, I’ll explain how to set up power-on behaviour, what the different settings are, and answer some frequently asked questions.
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There are two main use cases where the power-on behaviour will prove useful:
Of course, these aren’t the only use cases as I’m sure everyone will have their own situation.
Power-on behaviour will only work with Philips Hue bulbs that are connected to a Hue Bridge V2 (it will not work with a V1 bridge).
Here is how to amend the power-on behaviour of your Philips Hue lights:
When you first install your Philips Hue bulbs, they will be set to default. Here is what each of these settings means:
Default – This is warm white on full brightness.
Power Loss Recovery – When there’s a power outage, once it resumes the light goes to the last used colour and brightness before the power outage.
Custom – Choose a colour and brightness to return to when power resumes.
Power-on behaviour will be activated when power to the bulbs is lost and resumed.
However, if there are multiple losses of power within a short period of time (i.e., power is lost twice within a 12 second window), the bulbs are designed to switch to full brightness.
This is so that you can use your Hue bulbs as regular bulbs with a light switch in case other hardware (e.g., Hue Bridge or Wi-Fi) fails in the power cut.
You can imitate this to see how your bulbs respond by quickly toggling the light on and off at the switch.
If you have other third-party smart bulbs added to your Hue app (e.g., Ikea Tradfri) these will not work with power-on behaviour.
If you try to set these up in the settings menu, it will just say that the devices are not supported.
No, power-on behaviour is defined for each individual light bulb. If you want to set a specific colour for each bulb when it comes on, you can use swatches for each bulb.
If you have set up routines, the power-on behaviour will not resume a routine. It will skip straight to the end state of the routine.
For example, say you have a wake-up routine that starts at 25% brightness at 8am and slowly increases to 100% at 8.30am. A brief power outage that resumes at 8.15am will jump to 100% brightness.
No, power-on behaviour cannot be changed according to time.
What happens if the power goes out on my Hue lights during the night?
If you have set power-on behaviour to ‘power loss recovery’, the lights will return to their previous setting after a power outage. Presumably, this would be ‘off’ if it’s the middle of the night.
Power-on behaviour will be included within the software of any bulbs launched since December 2018 when it was first launched. For older bulbs, updating the firmware will add the functionality to your bulb.
Once updated, the option should appear in the Philips Hue app as outlined above.
Here are a few reasons why power loss behaviour might not be working on your Hue bulbs:
When in power loss recovery mode, a bulb takes 7 seconds before it stores the most recent light state. If you are trialling power loss recovery at home, ensure you allow this gap before turning off the switch.
Power-on behaviour is only available for Philips Hue bulbs. It will not be available if you have third party bulbs, even if they are connected to a Hue Bridge.
Power-on behaviour was an update, if you have older bulbs, ensure both the bulb has the latest firmware and that you are using the most up to date version of the app.
If power is triggered quickly in succession, the bulbs are designed to switch to 100% brightness so they can be used as dumb lights (as outlined in the article). Sometimes, spikes in power resumption, even if a few milliseconds, can cause power-on behaviour to change. Unfortunately, there is no way to change this.
If power-on behaviour still isn’t working, you can follow these troubleshooting steps: