This looks like a good place for this question, which is not the same as the op's, but on the subject of hue and echo.
I enabled the single Hue bulb that came with my echo in the package. Named it and alexa turns it on and off and dims it, etc. Since then I've gotten a hue starter kit with a hub and 4 bulbs. The hub could see the new bulbs and the original one as well, but can not control or communicate with the original. I removed it from echo smarthome, and still the hub sees it but won't control it. I then put echo back on the case, and alexa can control the hub, AND it found and can control the original bulb again, but if, for instance, I ask for all lights on or off, the original is not controlled by alexa or the hub. Individually by name alexa can control the original.
Long story for short question, how to reset or reboot that original lightbulb so that the hub, which acknowledges its presence, can control it? I think once that happens then alexa will be able to include it in the "all lights" command. I wonder if it's a case of powering the bulb down or removing it from the socket for a period of time, which I have not done but will try tonite.
Grateful for any insight, zz03