Ceiling light

{
  "id": "MLC-T-MET-004212",
  "term": "Ceiling light",
  "field": "Meteorology and atmospheric science",
  "definition": "A specialized light projector used at night to determine the height of the cloud base. A beam of light is directed vertically onto the cloud, and the angle of the spot from a known distance is measured by a clinometer. This method provides an accurate measurement of cloud ceiling for aviation purposes.",
  "synonyms": [
    "ceiling projector"
  ],
  "see_also": [
    "ceilometer"
  ],
  "url": "https://mlchart.com/terminology/meteorology/ceiling-light/"
}