The Tool Desk
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Choose the approach that fits your lights and schedule
| Approach | What it does | Best fit |
|---|---|---|
| Flux (built in) | Changes the color temperature of configured lights that are on according to time of day. Home Assistant describes brighter daytime light and a fade toward warmer red/orange tones at night. | You want time-based color-temperature changes without installing a custom component. |
| Adaptive Lighting (custom) | Adapts brightness and color based on sun position and time, and allows manual control. It is installed through HACS. | You want brightness adaptation and additional controls, and are comfortable using a community-maintained component. |
| Your own automations | Home Assistant light actions can set supported brightness and color-temperature values and transitions; Sun events can trigger schedules around local sunrise and sunset. | You want direct control over timing, transitions, and automation logic and are willing to maintain it. |
Flux is the simplest built-in route if adjusting color temperature is enough. Choose Adaptive Lighting or custom automations if brightness changes are important. Home Assistant’s Flux documentation describes its purpose as changing light temperature through the day in a way similar to the Flux computer app: Flux integration documentation.
Check light compatibility before building a schedule
Home Assistant exposes different controls depending on the light and its device integration. A bulb may support brightness, color temperature, RGB color, or only some of these. Inspect the target light entity and confirm its available features before relying on a schedule. See Home Assistant’s Light documentation.
- For dimming: the light must expose brightness control.
- For warmer and cooler whites: look for adjustable white color temperature.
- For RGB-based color changes: confirm the integration exposes RGB control and that the chosen component supports the light.
A dimmable tunable-white smart bulb is a practical starting point for this kind of setup; RGB capability may also suit some configurations. Verify the exact model’s Home Assistant integration and exposed features rather than assuming that all bulbs from a brand behave alike.
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Set the home location for sun-based schedules
Home Assistant’s Sun integration calculates sunrise, sunset, dawn, and dusk from the configured home location. Those events are available to automations as triggers and conditions, which lets a schedule follow local daylight instead of relying only on fixed clock times. Check the location in Home Assistant’s configuration and see the Sun integration documentation before building sun-based rules.
Set up Flux for time-based color temperature
Flux is a built-in Home Assistant integration. Configure it for the lights you want to affect; it changes color temperature according to time of day and applies to configured lights that are on. Its documented behavior focuses on color temperature, so it may not meet a goal of automatically changing brightness as well.
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For setup details and current configuration options, use the Flux integration page. Check the selected entities’ supported features first: a schedule cannot create color-temperature control that a light does not expose.
Use Adaptive Lighting when you want brightness adaptation
Adaptive Lighting is a community-maintained custom component installed through HACS. Its project documentation lists brightness as required, color-temperature support as preferred, and RGB as a fallback. Because this is community-maintained software, installation steps and options can change; consult the Adaptive Lighting repository for current instructions.
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Its support for manual control is useful when you want to adjust a light yourself rather than have a schedule dictate every change. Review the component’s override behavior and options against your routine, and test it with the specific light entities you plan to use.
Use custom automations for exact timing and transitions
Custom automations give you the most direct control over what happens at each point in the day. Home Assistant’s light actions can set brightness, color temperature, and transitions where the entity supports them. Sun events can provide location-based timing; fixed times can be used when you prefer a clock schedule.
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- Circadian Rhythm Optimization – Features 2700K, 2100K, and 1400K settings to sync with your body’s natural cycles, supporting better sleep, evening relaxation, and daytime alertness. The lights are dimmable and flicker free.
- Full-Spectrum 2700K Brilliance – Delivers warm, natural, full-spectrum light to boost mood, minimize eye strain, and ensure precise color accuracy for everyday tasks.
- Zero Blue Light Night Mode – The 1400K "Campfire" setting eliminates blue light, ideal for pre-sleep wind-downs, preserving your circadian rhythm and promoting restful sleep.
- Energy-Saving & Flicker-Free Design – This 7W LED bulb offers efficient, flicker-free performance, providing steady, comfortable illumination without headaches or fatigue.
- Effortless Switch Control with Memory – Seamlessly toggle between modes using your existing light switch; the bulb recalls your last setting for hassle-free convenience.
Build the schedule around the controls exposed by each target light, then test its daytime and evening behavior. If manual adjustments matter, decide how your automation should respond to them before relying on it throughout the home.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Hue setup and scene behavior
To use Philips Hue lights through Home Assistant, add the official Philips Hue integration and connect the Hue bridge. Home Assistant imports Hue scenes, and its documentation recommends Hue scenes when controlling several Hue lights together for a smoother result. See the Philips Hue integration documentation.
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Adaptive Lighting does not update scenes stored on the Hue bridge. If you activate those scenes outside the Home Assistant adaptation path, do not assume they will reflect the component’s current adjustments; the project documentation describes this limitation. A Philips Hue Bridge is relevant for this Hue setup, but a bridge is not a universal requirement for smart lighting from other brands.
What circadian lighting does—and does not establish
These integrations and automations describe ways to change home lighting over time. Their documentation establishes software behavior and compatibility requirements; it does not establish that a particular setup improves sleep, mood, or health. Treat circadian-style lighting as an automation approach, not a proven treatment.
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