SYLVANIA Bluetooth LED Smart Light Bulbs

I've now installed these bulbs in two different houses with five different Echo devices. My experience has been a bit of a mixed bag. Here's what I've learned: ------------------------------------ PROS: ------------------------------------ 1) The bulbs connect directly to the Echo device, so you don't need to use the manufacturer's app to manage/install the bulbs, nor do you need a dedicated hub. For a while, every time we got a new bulb I had to download a different app to install it and connect it to Alexa. 2) Because they use Bluetooth instead of Wi-Fi, these lights continue to work even when the internet is down (if the Echo can also function without internet). 3) Setup is super-easy. The pre-registration feature makes it even easier. 4) Great for Echo Dots which don't function as Zigbee hubs. 5) The mesh functionality appears to work okay, giving a farther range than regular Bluetooth. 6) Once I started using these bulbs, I immediately switched to using them exclusively. ------------------------------------ CONS: ------------------------------------ [EDIT #2: Nearly all of the bugginess (#2 below) appears to have been caused by having bulbs on different Alexa systems within Bluetooth range of each other. I'm assuming the mesh functionality of the bulbs was the culprit. We moved a bulb in one system to another (more distant) fixture and suddenly the problems with the other system disappeared (for the most part). They still occur, but now only once or twice per month versus every few days. Note that this was for bulbs on two separate Alexa systems, each connected to a different Amazon account, and not two connected Echo devices on the same account. Still buggy but not nearly as often as before.] [EDIT: <removed>] 1) After initial installation, the whole Alexa system will often have issues with recognizing devices. I've often found it necessary to reboot the Echo device after installing these bulbs. But once things get going, those problems tend to disappear. 2) They can be a bit buggy. I've had intermittent issues with certain bulbs becoming unresponsive. Sometimes it fixes itself and works after another try. Other times I have to toggle the wall switch to turn the bulb off and on, which seems to always fix it. It's weird how it only happens with some bulbs, and I'm beginning to suspect that random manufacturing errors [<incorrect, see edit #2 above>] may be the cause. I also think this may be the reason for the one-star reviews where people say it won't install or connect to Alexa. 3) The options for this type of bulb are very limited. They only come in 800 lumens, and I prefer something higher. Also, the single-color bulbs only come in soft white, and I prefer regular white. The color version of this bulb can be set to five different shades of white, including regular white, but it's more expensive. ------------------------------------ CONCLUSION: ------------------------------------ Despite the intermittent bugginess and lack of selection, I heartily recommend this bulb for an Alexa system because it's so much better than the other ones I've used, in terms of setup, dealing with network outages, and having to use the manufacturer's app to connect it to Alexa. That being said, if you prefer your lighting to be on the brighter side, I suggest the color version of this bulb with its multiple shades of white. Even though it's still 800 lumens, it seems brighter when set to regular white.