Could I control them with my phone?
Yes, you can. It is very comfortable.
It depends on what kind of smart light bulbs you want to buy. There are a lot of types of smart light bulbs. If you want to control them with your phone, you have to buy more modern and quality bulbs that cost a little more but are worth the money. I don’t know if you like color-changing light bulbs, but I love them. I ordered a set of color-changing light bulbs from a website, and I am satisfied. They have a variety of 16 million colors, and with the help of the phone, I can easily change their color. And by the way, it costs very little.
Yes if they have the bluetooth function with them.