Thanks for your reply.
I added both lamps initially via PaperUI to get the tokens. Then I removed them and added both via .things.file.
There is no other HA-Software running besides openhab.
I set the logging to DEBUG here are some outputs:
Working ceiling light power switch off > on:
2020-09-27 14:48:33.886 [ome.event.ItemCommandEvent] - Item 'power_yeelight_wz' received command ON
2020-09-27 14:48:33.931 [nt.ItemStatePredictedEvent] - power_yeelight_wz predicted to become ON
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:48:33.955 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Locating action for channel 'power': 'ON'
2020-09-27 14:48:33.962 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Sending command set_power["on"]
2020-09-27 14:48:33.966 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Command added to Queue {"id":23,"method":"set_power","params":["on"]} -> x.x.x.x (Device: deviceId token: myToken Queue: 1)
2020-09-27 14:48:33.968 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:wz' (miio:basic)
==> /var/log/openhab2/events.log <==
2020-09-27 14:48:33.969 [vent.ItemStateChangedEvent] - power_yeelight_wz changed from OFF to ON
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:48:33.971 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Command added to Queue {"id":24,"method":"get_prop","params":["power","bright","delayoff","ct","color_mode"]} -> x.x.x.x (Device: deviceId Token: myToken Queue: 2)
2020-09-27 14:48:33.974 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Command added to Queue {"id":25,"method":"get_prop","params":["name","nl_br"]} -> x.x.x.x (Device: deviceId token: myToken Queue: 3)
2020-09-27 14:48:33.977 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Command added to Queue {"id":26,"method":"miIO.info","params":[]} -> x.x.x.x (Device: deviceID token: myToken Queue: 4)
2020-09-27 14:48:34.043 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for wz type: SET_POWER, result: ["ok"], fullresponse: {"result":["ok"],"id":23}
2020-09-27 14:48:34.064 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for wz type: GET_PROPERTY, result: ["on","1","0","3500","2"], fullresponse: {"result":["on","1","0","3500","2"],"id":24}
2020-09-27 14:48:34.094 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for wz type: GET_PROPERTY, result: ["","0"], fullresponse: {"result":["","0"],"id":25}
Here the same for my Meteorite OFF > ON:
2020-09-27 14:56:31.887 [ome.event.ItemCommandEvent] - Item 'power_yeelight_meteorite' received command ON
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:56:31.971 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Locating action for channel 'power': 'ON'
2020-09-27 14:56:31.974 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Sending command set_power["on"]
2020-09-27 14:56:31.979 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Command added to Queue {"id":111,"method":"set_power","params":["on"]} -> x.x.x.x (Device: meteoriteId token: myToken Queue: 10)
2020-09-27 14:56:31.984 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
==> /var/log/openhab2/events.log <==
2020-09-27 14:56:31.989 [nt.ItemStatePredictedEvent] - power_yeelight_meteorite predicted to become ON
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:56:31.989 [DEBUG] [internal.handler.MiIoAbstractHandler] - Skipping periodic update for 'miio:basic:meteorite'. 10 elements in queue.
==> /var/log/openhab2/events.log <==
2020-09-27 14:56:32.030 [vent.ItemStateChangedEvent] - power_yeelight_meteorite changed from OFF to ON
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:56:41.498 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
2020-09-27 14:56:41.501 [DEBUG] [internal.handler.MiIoAbstractHandler] - Skipping periodic update for 'miio:basic:meteorite'. 10 elements in queue.
2020-09-27 14:56:43.881 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Communication error for Mi device at 192.168.2.109: Receive timed out
2020-09-27 14:56:43.884 [DEBUG] [nal.transport.MiIoAsyncCommunication] - No response from device meteoriteId at x.x.x.x for command {"id":101,"method":"get_prop","params":["color_mode","name","bg_power","bg_rgb","bg_ct"]}.
2020-09-27 14:56:43.888 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: {}, fullresponse: {"error":"No Response"}
2020-09-27 14:56:43.891 [DEBUG] [internal.handler.MiIoAbstractHandler] - Error received: "No Response"
2020-09-27 14:56:43.918 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["1","0"], fullresponse: {"result":["1","0"],"id":102}
... some times later
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:57:44.107 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["2","","off","65300","3451"], fullresponse: {"result":["2","","off","65300","3451"],"id":105}
2020-09-27 14:57:44.148 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["1","0"], fullresponse: {"result":["1","0"],"id":106}
2020-09-27 14:57:44.170 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["off","5","70","0","3500"], fullresponse: {"result":["off","5","70","0","3500"],"id":107}
2020-09-27 14:57:44.238 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["2","","off","65300","3451"], fullresponse: {"result":["2","","off","65300","3451"],"id":108}
2020-09-27 14:57:44.258 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: ["1","0"], fullresponse: {"result":["1","0"],"id":109}
2020-09-27 14:57:44.325 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: MIIO_INFO, result: {"life":2171790,removed sensitive data}
2020-09-27 14:57:44.359 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: SET_POWER, result: ["ok"], fullresponse: {"result":["ok"],"id":111}
2020-09-27 14:57:51.539 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
Some other DEBUG output regarding my meteorite:
==> /var/log/openhab2/openhab.log <==
2020-09-27 14:53:21.305 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
2020-09-27 14:53:21.310 [DEBUG] [internal.handler.MiIoAbstractHandler] - Skipping periodic update for 'miio:basic:meteorite'. 9 elements in queue.
2020-09-27 14:53:31.315 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
2020-09-27 14:53:31.317 [DEBUG] [internal.handler.MiIoAbstractHandler] - Skipping periodic update for 'miio:basic:meteorite'. 9 elements in queue.
2020-09-27 14:53:41.320 [DEBUG] [io.internal.handler.MiIoBasicHandler] - Periodic update for 'miio:basic:meteorite' (miio:basic)
2020-09-27 14:53:41.323 [DEBUG] [internal.handler.MiIoAbstractHandler] - Skipping periodic update for 'miio:basic:meteorite'. 9 elements in queue.
2020-09-27 14:53:41.414 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Communication error for Mi device at x.x.x.x: Receive timed out
2020-09-27 14:53:41.417 [DEBUG] [nal.transport.MiIoAsyncCommunication] - No response from device meteoriteId at x.x.x.x for command {"id":90,"method":"get_prop","params":["power","bright","bg_bright","delayoff","ct"]}.
2020-09-27 14:53:41.422 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: {}, fullresponse: {"error":"No Response"}
2020-09-27 14:53:41.425 [DEBUG] [internal.handler.MiIoAbstractHandler] - Error received: "No Response"
Looks like there is some kind of communication error:
2020-09-27 15:10:13.254 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Communication error for Mi device at x.x.x.x: Receive timed out
2020-09-27 15:10:13.259 [DEBUG] [nal.transport.MiIoAsyncCommunication] - No response from device deviceId at x.x.x.x for command {"id":11,"method":"set_power","params":["on"]}.
2020-09-27 15:10:13.263 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: SET_POWER, result: {}, fullresponse: {"error":"No Response"}
2020-09-27 15:10:13.267 [DEBUG] [internal.handler.MiIoAbstractHandler] - Error received: "No Response"
2020-09-27 15:11:13.318 [DEBUG] [nal.transport.MiIoAsyncCommunication] - Communication error for Mi device at x.x.x.x: Receive timed out
2020-09-27 15:11:13.321 [DEBUG] [nal.transport.MiIoAsyncCommunication] - No response from device deviceId at x.x.x.x for command {"id":12,"method":"get_prop","params":["power","bright","bg_bright","delayoff","ct"]}.
2020-09-27 15:11:13.324 [DEBUG] [internal.handler.MiIoAbstractHandler] - Received response for meteorite type: GET_PROPERTY, result: {}, fullresponse: {"error":"No Response"}
2020-09-27 15:11:13.327 [DEBUG] [internal.handler.MiIoAbstractHandler] - Error received: "No Response"