# Experience with GRAU Falling Sun (or GRAU lights) via Matter or Casambi on Homey Pro?

**URL:** https://community.homey.app/t/experience-with-grau-falling-sun-or-grau-lights-via-matter-or-casambi-on-homey-pro/148578
**Category:** Devices
**Tags:** matter, lights
**Created:** [January 5, 2026, 8:34am UTC](https://community.homey.app/t/experience-with-grau-falling-sun-or-grau-lights-via-matter-or-casambi-on-homey-pro/148578 "2026-01-05T08:34:37Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![homify](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/homify/32/95781_2.png) [@homify](https://community.homey.app/u/homify)
#### Post date: [January 5, 2026, 8:34am UTC](https://community.homey.app/t/experience-with-grau-falling-sun-or-grau-lights-via-matter-or-casambi-on-homey-pro/148578/1 "2026-01-05T08:34:37Z")

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Hi everyone,

I’m currently evaluating the GRAU Falling Sun Trace pendant light for a dining area and would like to integrate it into a Homey Pro (2023) based setup.

Before making a purchase, I’m trying to understand whether there are real-world experiences with integrating GRAU luminaires into Homey, especially via Matter or Casambi.

**Context**

- Main automation platform: Homey Pro (Matter controller)

- User interfaces: Apple HomeKit (Siri) and Philips Hue

- Goal: local, long-term maintainable integration (no cloud dependency)

- The Falling Sun uses Sunset Dimming, meaning brightness and color temperature are internally coupled (brightness is the only external control parameter)

**What GRAU told me**

- They have installed Matter modules for a small number of customers on request

- However, they currently have no concrete feedback or documented experience on how well this works in practice

- Matter and Casambi cannot be used in parallel (single control module)

- Brightness and color temperature cannot be controlled separately anyway

**My questions to the community**

- Has anyone here successfully integrated GRAU lights with Homey Pro?

- Specifically:

- If using Matter:

- If using Casambi:

At this point I’m mainly trying to decide whether Matter is already a safe choice in practice, or whether Casambi is currently the more reliable option despite being proprietary.

Any real-world feedback would be highly appreciated.

Thanks in advance!