This listing has moved
It was merged into Lightinginside Matter Smart A19 E26 RGBCW Light Bulbs 4-Pack, the same product. That page has the retailer options and certification details.
Matter support is claimed, but no CSA certificate is verified for this exact model. Uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller.
At a glance: Matter certified: Not verified (Matter support claimed) · Connectivity: Wi-Fi · Thread border router: Not needed (uses Wi-Fi)