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GE Cync Full Color ST19 (Matter)

GE Cync / CLEDST196CDGSMS

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Does the GE Cync Full Color ST19 (Matter) work with HomeKit, Alexa, and Google Home?

The Cync Full Color ST19 (Matter) is a 500 lm full-color ST19 Edison-style bulb.

It supports Matter with HomeKit, Alexa, Google Home and SmartThings, and also works in the Cync app. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users, with native support through Matter over Wi-Fi.

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Yes[1]
Matter / Wi-Fi, native
Google Home
Yes[1]
Matter / Wi-Fi, native; 1 other path
Alexa
Yes[1]
Matter / Wi-Fi, native; 1 other path
SmartThings
Yes[1]
Matter / Wi-Fi, native
Home Assistant
Yes[2–4]
Matter / Wi-Fi, native; 1 other path

Key facts

GE Cync Full Color ST19 (Matter) facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[1][5]
BaseE26 (US standard)[1]
ShapeST19[1]
Light output500 lm[1]
ConnectionMatter over Wi-Fi[1]
MatterYes[1][2]
HomeKitHomeKit via Matter[1]
RadiosBluetooth, Wi-Fi, Matter[1]
ColorFull color[1]

Integration paths

How the GE Cync Full Color ST19 (Matter) connects

2 pathsHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Matter / Wi-Fi2.4 GHz Wi-Fi network, Matter-compatible app[1]unknownunknown
Wi-Fi cloud2.4 GHz Wi-Fi network, Cync app[1]unknownunknown
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Ways to add the GE Cync Full Color ST19 (Matter)

4 routesHow facts are sourced: every cell cites its source below
PlatformLeveliIntegrationDetailsEvidenceLimitations
Home AssistantVia Matter[2][3] (Matter certified; Home Assistant does not name the model)matterMatter / Wi-Fi
  • Quality: No score[2][3]
  • IoT class: Local Push[2][3]
  • Works with Home Assistant: Not certified[2][3]
Model namedNone stated
Home AssistantNative (cloud)[4]cyncWi-Fi cloud
  • Quality: Bronze[4]
  • IoT class: Cloud Push[4]
  • Works with Home Assistant: Not certified[4]
Product line namedNone stated
Home AssistantCommunity[8–10]Proxy-alt/cync-lanWi-Fi cloudProduct line namedLimited: Needs the Cync cloud hostnames redirected to Home Assistant by DNS at the router, and at least one mains-powered Wi-Fi Cync device as the Bluetooth bridge.[8–10]
HomeyVia Matter[2][6][7] (Matter certified; Homey does not name the model)matterMatter / Wi-FiModel namedNone stated
About these columns
Level
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.

Releases

  1. 2024
    1. Certified Certified, not announced [2]

      First Matter certificate.

Certifications

Certification records

2 recordsHow facts are sourced: every cell cites its source below
ProgramCertificateCertified onTransportSpec / softwareSource
MatterCSA24021MAT42708-24wi-fi, bluetooth1.01.170[2]
MatterCSA2505CMAT44974-24wi-fi, bluetooth1.03.190[2]

Cite this page

GE Cync Full Color ST19 (Matter). Smart Home Canon. https://smarthomecanon.com/devices/cync-full-color-st19-matter. Last checked 2026-10-20.

Sources

  1. [1]
    MFRgelighting.com / GE Cync ST19 Smart LED Light Bulb, Color Changing WiFi Light, Works With Alexa and Google Home, Edison Style Light Bulb - GE Lighting
    Accessed Back to text
  2. [2]
    CSAon.dcl.csa-iot.org / Matter DCL compliance: GE Lighting, a Savant company, PID 97
    Accessed Back to text
  3. [3]
    DOChome-assistant.io / Home Assistant: Matter integration
    Accessed Back to text
  4. [4]
    DOChome-assistant.io / Home Assistant: Cync integration
    Accessed Back to text
  5. [5]
    MFRgelighting.com / GE Lighting: Cync smart home products
    Accessed Back to text
  6. [6]
    DOChomey.app / Homey Pro (lists Matter connectivity)
    Accessed Back to text
  7. [7]
    DOCsupport.homey.app / Homey Support: Matter for Homey (Add a Matter device to Homey)
    Accessed Back to text
  8. [8]
    DBgithub.com / GitHub: Proxy-alt/cync-lan
    Accessed Back to text
  9. [9]
    DBgithub.com / cync-lan: known devices
    Accessed Back to text
  10. [10]
    DBgithub.com / HACS default list: integration
    Accessed Back to text