how do i send 0.2 offchain btc to on chain wallet
It would be easier if you told what client you're actually using, because one client isn't the other, and do you run a full node or do you use a light client connected to a third party node?
I'm personally using the Bitcoin Lightning Wallet from anton kumaigorodski on Android. This client easily allows me to close the channel and have the funds be sent to whatever address I want. It's noob friendly with how every feature is easy to find and utilize. Good alternative in case you're testing out Lightning again.
In general, you go to your open channels, and from there you should be able to close them.
