Domoticz

Version: 3.7067
Build Hash: eef0785-modified
Compile Date: 2017-03-20 11:00:54
Running on: Synology NAS

I wanted to make a switch that would turn on/off lights at a fixed time, but I can only select 'on', not off.

Make a virtual sensor and base a script on that sensor value.

You should be able to set on / off / dimmer level even, so it looks like something is wrong, it could be a number of things.

The edit screen for the switch would say what type of light it is, if it is set as push on, then there won't be an off.

Alternatively, this looks like your browser cache needs flushing. Try on a different browser do you still only have one choice?

Do any of your lights give you an off option?