If you were just going to do a phillips lighting, you can get the hubs online for £20 on FB marketplace. It will work better than having it as a hub. But if you just want a few bulbs or have other zigbee devices, then a hub enabled device will be able to do that.
We have an alexa device in every room. We have multiple Sonos speakers in various rooms, we have hue lighting in every bulb fitting and in the garden. We have Nest heating (as well as smoke alarms and cameras). We also have various devices like PS4, TV, receiver etc. We use a harmony hub remote and alexa to make all this hang together. For example if I say alexa turn on the TV, it will turn on the TV, receiver, switch inputs on the receiver, set the TV to Tuner &, depending on the time, set the Hue lights to our default settings (or do nothing if it's not past a certain sliding time in line with sunset times). Likewise when switching things over, it will power off the other devices. It will control TV volume, pause the TV, all that kind of thing. Emergency lighting is activated when the smoke alarms are triggered and the boiler is turned off. We have routines for the lights we enable when we are away. We have groups of lights so we can turn off all the upstairs lights when going downstairs, or we have a night routine where it will turn everything off except low level lighting in the hall, stairs and bedroom, which will turn off after a few minutes. You can use motion sensors etc and we are probably going to put some of those on our driveway for when we get home as its quite long and could use some lighting. We have light switches in our house, but we haven't used them for the last 2 years. Took the girlfriend about 2 weeks to get used to it and she is a massive technophobe. she has one wifi switch in her dressing room so she can cycle between various light settings for makeup etc but other than that, everything is voice.
Some useful things for Alexa;
- Cooking - you can set layered and named timers. If you get one of the dot echos with an LCD timer on it, this can also be useful for countdowns. I do a lot of cooking and its useful having 4-5 different named timers going with how long is left before the next activity.
- Reminders - use this a lot to remind me at a specific date & time
- Amazon alerts - when something is getting delivered today you will get a notification
- Intercom - alexa devices can be used as an intercom by saying "drop into <room name>"
- Announcements - you can use it as a PA system to play a message in all rooms. I use this when food is ready or when ive shouted up and gotten no response.
- messaging mates - either voice messages, drop in, transcribed messages etc.
- Basic questions - if you need to calculate anything quickly, or ask it a question, it is able to answer a surprisingly decent range of questions, likewise converting things into other currencies or weights or liquid amounts, again useful during cooking where there are US and UK measurements.
- Other than music, it will also play audio books from audible.
- Loads of gimmicky stuff for kids like jokes or daft things you can ask it but we dont really use that much
To be honest for music I find the quality ok but fairly poor compared to things like Sonos or a hifi, except on the larger ones, and for that money I'd rather have a Sonos. All the dots we have picked up on black fridays for £20 or less, or gotten free through promotions. They handle all the voice queries in each room, and just control the other audio stuff for playback