I have connected the smart bulbs to the SYLVANIA app and they respond. I have found the devices in Alexa App, but when I try to control them through Alexa, she says device unresponsive
I returned all SYLVANIA devices. The reputation and recommendation is to never use a SYLVANIA device.
They are considered dubious at best, and absolutely unreliable at worst.
My experience was, most of one and part of another. I will not be using this product in the future. I’d sell the stock if I owned any.