You can open payment channel to our mainnet node from the wallet with Lightning support using URI or QR code below.
URI: 028e5a8e86540f703e1f58880d35d1e318a54c27d84ec1edbcde04a78ed4469a1e@148.251.53.235:9735
Please note the tech under Lightning is not stable yet, so do your testing on testnet only!