Yes, this is possible, but it isn't an obvious answer. In order to do this, you have to send a raw INSTEON command to the SwitchLinc to configure it for the new default on-level. Here's how I'd do it for sunset and sunrise.
For sunset, create a new trigger with the following settings:
- Name: (anything you like). Notes: (also anything you like).
- Trigger tab: Type: "Variable Changed", Variable: "isDaylight", "becomes false (false, off, no, 0)" selected.
- Condition tab: "Always" selected.
- Actions tab: (for Indigo 6) Type: "INSTEON Actions" -> "Send Raw INSTEON Command". (for Indigo 5) Type: "Plugin", Plugin: "INSTEON Commands", Action: "Send Raw INSTEON Command".
- Click "Edit Action Settings..." button. The configuration dialog should have the following settings:
- Device: (your SwitchLinc Dimmer).
- Command 1 Byte: 0x2E
- Command 2 Byte: 0x00
- "Send extended message" checked.
- D1 Byte: 0x01
- D2 Byte: 0x06
- D3 Byte: (any number you want from 0 to 255, without 0x in front)
- D4 Byte through D14 Byte: 0x00
- Click Save
- Click OK
The number entered for the D3 Byte above can have a range of 0 to 255 where 0 is a brightness of 0% (off) and 255 is a brightness of 100%. So, if you wanted a brightness of 50%, you'd enter 127 for D3.
To create a sunrise trigger to change the default level, just use the above procedure but change the Variable's condition to "becomes true (true, on, yes, 1)" and change the D3 Byte to the level you want for daytime.
Note that setting the SwitchLinc Dimmer's default on-level directly doesn't update Indigo's internally stored information about the SwitchLinc, so when you press the on button on the SwitchLinc, Indigo will think the light is on at whatever default level you set in Indigo, even though the actual light level will be the default level you reconfigured the SwitchLinc to with the above raw command.