Brand/model isn’t important.
You’ll need a HomeAsstant controller. You can buy one premade or you can look up tutorials and make your own with a raspberry pi or old laptop or PC. Then you’ll need a ZigBee controller, this is a radio that will talk to your smart lights and other accessories.
You then get ZigBee compatible lights. Phillips Hue is the top of the line but so stupidily expensive I’d never recommend it. Innr makes good ones at half the cost. ThirdReality makes decent ones too for even cheaper.
You’ll probably also want some ZigBee switches to have physical controls for your lights instead of just by phone. They make models that replace your actual light switches. Or, if you rent like me and can’t modify that, you can get battery powered ones that stick on the wall. Battery life is like a year or more so not too bad.
That’ll do it. You can also use HomeAssistant now that you’ve got it. It’s a home automation software that’s open source and locally controlled. You can hook up much more than your lights. Smart plugs, your TV, 3D printer, fans, cameras, tons of sensors, your thermostat, robovac, etc. Then make automations that connect them. For example my living room ZigBee switch, one press up toggles the main lights. Double press for the lamp. Hold down and it turns off all lights and the TV. Some lights like my closet light are controlled by a door sensor instead of a switch, so they come on automatically. Some people prefer motion sensors so all lights are automatic. Turn off stuff automatically when you leave, etc.













No. They aren’t controlled via Internet (they can be, but it’s not vital). You have Zigbee switches that control them through radio. Or you control them with your Zigbee controller which is hooked up to your network, but works locally so even if your Internet is down it works on LAN.
Depends on the brand. Some do this. Most do out of the box but you can go into the settings of your Zigbee controller and disable that. Some don’t let you configure it. I’d read reviews first.
Also Phillips Hue is actually a Zigbee bulb, which can be used with non-Hue Zigbee controllers. If I’m reading right this setting can be configured. https://community.hueessentials.com/t/how-to-set-up-power-on-behaviour-for-my-lights/720