Home Assistant Exterior Lux approximation

lux.yaml

- platform: template
  sensors:

    above_cloud_lux:
      friendly_name: "Above Cloud Lux"
      unit_of_measurement: "Lux"
      value_template: >-
        {{ states.sun.sun.attributes.daylight | round(0) }}
    lux:
      friendly_name: "Exterior Lux"
      unit_of_measurement: "lux"
      value_template: '{{ ((100-states.sensor.dark_sky_cloud_coverage.state|float)/100 * states.sun.sun.attributes.daylight) | round(0)  }}'
# consider using other methods of calculation here as well
#  this could be calculated using the wunderground solar_radiation value, if available