--mode=[MODE]
    Set the operating mode. MODE can be one of:
        last - Uses the last-used mode, active if none.
        active - Parity continuously syncs the chain.
        passive - Parity syncs initially, then sleeps and wakes regularly to resync.
        dark - Parity syncs only when the RPC is active.
        offline - Parity doesn't sync. (default: last)
--mode-timeout=[SECS]
    Specify the number of seconds before inactivity timeout occurs when mode is dark or passive (default: 300)
--mode-alarm=[SECS]
    Specify the number of seconds before auto sleep reawake timeout occurs when mode is passive (default: 3600)