Help with automation using a light sensor to adjust the brightness of a bulb

I have an ESP8266 sensor (LDR) and I wrote this automation to turn the light brightness up when it gets dark.

alias: 'Light Level Office Brightness Increase '
description: ''
trigger:
  - platform: state
    entity_id: sensor.officelightlevel
    for:
      hours: 0
      minutes: 0
      seconds: 1
condition:
  - condition: numeric_state
    entity_id: sensor.officelightlevel
    below: input_number.office_light_target
action:
  - device_id: 3d85ad48c7142875bb4b320cdd1ef8b9
    domain: light
    entity_id: light.office_bulb
    type: brightness_increase
mode: single

I have the same automation that turns it down if its above the target however my 2 automations cannot achieve the exact light level so they end up fighting each other putting the brightness up and then down.

Any idea how I could stop that happening as it works well initially but once near to the target (say 100) and it reaches 100.1 dropping the brightness down by 1 step drops it to say 97 and then its incremented back up again.

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