The official way is to set up a “Lights and Switches” shortcut group. Note however that that will set all bulbs to the same dim level. It can be set up through the mobile app, no custom code required.
If you want different levels for different bulbs in the same group, you’ll have to use a custom smartapp like Dim and Dimmer from @geko or Scene Machine from @wackware. There are some others available as well. Each author can tell you more about their app.
