Outdoor Landscape Color Controllable Lighting

To be more specific to your exact questions

  1. Yes you can turn on/off, Change Colors, Change Brightness, Change CT, Set Dream view or Music mode, activate Govee effects or DIY Effects, and more
  2. Yes for standard light processes. I haven't figured out how to use Light Apps with Light scenes/Effects, You can use them with RM though.

It comes with a controller

Depends on the devices. Many will be one controller per device, Some will allow you to expand the devices to a certain amount. A good example of one that is expandable are the Perm Outdoor Lights. Another is the Govee Hexa Light Pro's. Generally the reason they wouldn't be expandable is because of the power supply provided as they are intended to be a complete package and take the guesswork out of figuring out what you need to get.

Pretty much everything Govee now uses RGBIC so they are broken in to segments or pods that can all do their own thing. You can go to this link here and see what I have outside right now. Just click on the link in the middle of the post.