I only have this as it comes free with the echo plus. As stated light output is yellowish in color. I use it as an outside light near the main door. I find it expensive compare to other competitor but easy to pair with echo plus
I'm sure the bulb works perfectly however they should be more clear that the HUB is required! Now all I have is a very expensive, useless bulb at home that does exactly the same job as a $1 bulb. Other smart bulbs like LIFX don't require any type of hub to work perfectly.