zapping(ZAP_SLEEP, powc * 83 / 100, beam);

    {
        const int sleep_power =
            stepdown_value( powc * 9 / 10, 5, 35, 45, 50 );
#ifdef DEBUG_DIAGNOSTICS
        mprf(MSGCH_DIAGNOSTICS, "Sleep power stepdown: %d -> %d",
             powc, sleep_power);
#endif
        zapping(ZAP_SLEEP, sleep_power, beam);

    }