Within Light pillars
Why Vertical UFO Beams Seem To Hover In Fog
Freezing fog and diamond dust can conceal the real light source and make a pillar appear suspended overhead.
On this page
- How freezing fog obscures ground lighting
- Diamond dust and low wind crystal conditions
- Witness distance and false altitude perception
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Introduction
A light pillar becomes far more convincing as a “vertical UFO beam” when freezing fog hides the ordinary light source creating it. In cold, calm weather, ice crystals suspended close to the ground can reflect light from street lamps, industrial facilities, greenhouses, vehicle headlights, ports, or floodlights into a tall luminous column. If fog, terrain, distance, or darkness conceal the source itself, the observer may only see the glowing vertical shaft apparently hanging in the sky. [atoptics.org.uk]atoptics.org.ukLight PillarsAtmospheric OpticsColumns of light apparently beaming directly upwards from unshielded (and wastefully polluting) lights are sometimes vi… [Wikipedia]WikipediaLight pillarLight pillar
This matters in AI-assisted UFO sighting investigation because witnesses are often reporting a real visual event, not inventing one. The error lies in altitude and source perception. A structured investigation therefore needs to test not only whether ice-crystal conditions existed, but also whether freezing fog could have masked the ground lighting responsible for the effect. In many winter UFO reports involving “hovering beams”, “light columns”, or “stationary portals”, the key investigative question is whether the witness could physically see the horizon and the originating light source at all.
How freezing fog obscures ground lighting
Freezing fog changes how a scene is visually organised at night. Ordinary reference points disappear first: roads, buildings, lamp posts, skylines, and industrial structures fade into diffuse grey darkness. Bright light, however, travels farther through the haze than the objects producing it. The result is a detached-looking glow with no visible anchor.
In freezing fog or ice fog, countless suspended ice particles scatter and reflect light while simultaneously obscuring the lower environment. Meteorological definitions describe ice fog as a fog composed largely of tiny suspended ice crystals forming in very cold, stable air. [Weather.gov]weather.goveratures in a stable atmosphere. Ice Fog. (Also called ice…
That combination produces a powerful illusion during UFO sightings:
- The witness sees a bright vertical structure.
- The lower few hundred metres of atmosphere are obscured.
- The actual lamp or facility may sit behind terrain, trees, warehouses, or fog banks.
- The pillar therefore appears suspended above the horizon rather than connected to the ground.
Atmospheric optics researchers note that light pillars are not physical beams extending upward. They are reflections from horizontally aligned ice crystals located between the observer and the source. [atoptics.org.uk]atoptics.co.ukLower sun pillarsAtmospheric Optics16 Dec 2024 — The lower pillars in mountain valleys are best after dawn when the valley is filled by an ice fog after a… [Wikipedia]WikipediaNational Oceanic and Atmospheric AdministrationNational Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA /ˈnoʊ.ə/ NOH-ə) is a United S… In practice, this means the “beam” can remain visible even when the originating light fixture is completely hidden.
For UFO investigations, this is one of the most important perceptual traps. Witnesses often assume that if no source is visible, the light must originate in the sky itself. Freezing fog breaks that assumption.
Why the beam appears detached from the ground
The visual separation effect becomes stronger with distance. A witness several kilometres away may only see the upper reflected portion of the pillar because the lower section is swallowed by fog or hidden behind curvature, hills, buildings, or tree lines.
This creates three common misinterpretations:
- A hovering object shining downward.
- A stationary “energy column”.
- A vertical craft partially concealed by cloud.
The geometry of the illusion is counterintuitive. Light pillars are produced only by crystals correctly aligned relative to the observer’s position. As Atmospheric Optics explains, the pillar is effectively a virtual image rather than a literal illuminated column. [atoptics.org.uk]atoptics.org.ukSun, moon, planet and light pillars - Atoptics Highlights OPODIn cold weather when there is low or ground level diamond dust they also ma… [Wikipedia]WikipediaLight pillarLight pillar
Because the eye naturally interprets bright vertical structures as solid objects, the brain fills in missing information below the fog line. Witnesses may genuinely perceive a continuous beam even when the lower connection to the ground is invisible.
This is especially convincing when:
- The pillar extends above low cloud.
- The lower horizon is fully obscured.
- The light source is unusually bright or coloured.
- The witness is observing from a moving vehicle.
- The surrounding landscape lacks reference points.
In some reports, observers describe the light as “starting in the clouds” because the hidden lower section never becomes visible.
Diamond dust and low-wind crystal conditions
The strongest detached-looking pillars usually occur during diamond dust events or freezing fog under calm conditions. Diamond dust refers to tiny free-floating ice crystals suspended near ground level, often in extremely cold air. [Wikipedia]WikipediaNational Oceanic and Atmospheric AdministrationNational Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA /ˈnoʊ.ə/ NOH-ə) is a United S… [NOAA]psl.noaa.govGlittering Light on WaterPhysical Sciences Laboratory - NOAAby HGP are Formed · 1999 · Cited by 15 — Glitter patterns on water are similar to vertical light pilla…
These conditions are ideal for UFO misidentification because the atmosphere simultaneously:
- Creates the pillar.
- Conceals the source.
- Removes depth cues.
- Softens the horizon.
Researchers and meteorologists repeatedly associate dramatic pillar displays with very low wind speeds because flat plate-like crystals remain horizontally aligned instead of tumbling chaotically. [Lee Petersen]lwpetersen.comLee Petersen Light PillarsLee PetersenLight Pillars - Atmospheric Optics - Lee Petersen29 Apr 2020 — Light pillars are caused by ice crystals reflecting relatively…
Calm cold air also allows the crystals to remain suspended near the ground, effectively forming a reflective optical layer. In mountain valleys or industrial cold basins, freezing fog can become dense enough that only the upper reflected portion of a pillar remains visible from a distance. Atmospheric Optics specifically notes that valley ice fog after cold nights can produce striking lower pillars and suspended-looking reflections. [atoptics.co.uk]atoptics.co.ukLight PillarsAtmospheric Optics16 Dec 2024 — Light pillars, a captivating atmospheric optical phenomenon, have been observed during extremely cold wea…
For investigators, weather records showing:
- freezing fog,
- ice fog,
- diamond dust, [reddit.com]reddit.comafter midnight (22° ring, sundogs, pillar, parhelic circle)…
- calm winds,
- temperature inversions,
- or very low surface temperatures
are highly relevant when evaluating reports of static vertical lights.
Witness distance and false altitude perception
One reason these sightings become so persuasive is that humans are poor at judging altitude and distance in darkness. Without visible terrain references, the brain estimates height from apparent brightness and angular size rather than actual geometry.
A distant light pillar may therefore appear:(#endnote-2 “Endnote 2”) [Wikipedia]WikipediaLight pillarLight pillar
- much closer than it really is,
- much taller,
- or suspended directly overhead.
The effect becomes stronger in fog because atmospheric scattering removes contrast cues that normally reveal depth. A pillar ten kilometres away can appear like a nearby aerial structure, particularly if the observer cannot see the ground beneath it.
This explains why many reports describe:
- “a beam coming from the sky”,
- “a hovering column”,
- or “a craft hidden above cloud”.
The observer is not necessarily misreporting what they perceived. The environment itself degraded depth perception.
Light pillars also shimmer and pulse as crystal orientations shift in subtle air currents. [Lee Petersen]lwpetersen.comLee Petersen Light PillarsLee PetersenLight Pillars - Atmospheric Optics - Lee Petersen29 Apr 2020 — Light pillars are caused by ice crystals reflecting relatively… Witnesses may interpret these fluctuations as controlled movement or energy variation rather than atmospheric optics.
Why moving observers often misjudge the phenomenon
Drivers frequently report that pillars appear to follow them or maintain position relative to the road. This is another side effect of the geometry involved.
Because only correctly aligned crystals reflect light toward the observer, the visible pillar changes dynamically as the observer moves. Atmospheric optics photographers note that pillars can rapidly change intensity and appearance during travel. [Lee Petersen]lwpetersen.comLee Petersen Light PillarsLee PetersenLight Pillars - Atmospheric Optics - Lee Petersen29 Apr 2020 — Light pillars are caused by ice crystals reflecting relatively…
In freezing fog, where the lower source is hidden, this behaviour can resemble:
- a tracking spotlight,
- a hovering object pacing a vehicle,
- or a stationary aerial structure remaining fixed despite movement.
AI-assisted case analysis can help test this interpretation by correlating:
- witness route direction,
- road position,
- local industrial lighting,
- terrain elevation,
- and weather conditions. [atoptics.co.uk]atoptics.co.ukLight PillarsAtmospheric Optics16 Dec 2024 — Light pillars, a captivating atmospheric optical phenomenon, have been observed during extremely cold wea…
If the geometry predicts changing pillar visibility along the observer’s path, the atmospheric explanation becomes much stronger.
What investigators should check in a winter “vertical beam” report
When a UFO report describes a stationary vertical light during cold weather, freezing fog should be treated as a primary environmental factor rather than a minor detail.
Useful investigative checks include:
- Surface observations reporting freezing fog, ice fog, or diamond dust.
- Wind speed records showing calm or near-calm air.
- Nearby industrial lighting, ports, greenhouses, floodlights, stadiums, or transport depots.
- Topography that could hide the light source below the observer’s line of sight.
- Visibility data showing reduced horizon contrast.
- Photographs revealing colour matching between the pillar and nearby lighting.
- Multiple parallel pillars associated with urban lighting grids.
Witness descriptions themselves often contain clues pointing toward obscured-source pillars rather than airborne craft. Common indicators include:
- perfectly vertical alignment,
- lack of horizontal movement,
- long-duration visibility,
- colour matching sodium or LED lighting,
- and stronger visibility in colder air.
In many investigated cases, the “mystery beam” disappears once daylight, clearer air, or a different viewing angle reveals the hidden ground source.
Why these sightings remain convincing
Even after explanation, freezing-fog light pillars can remain psychologically powerful. They often appear enormous, silent, sharply defined, and disconnected from anything visible on the ground. Under the right conditions they genuinely resemble cinematic depictions of alien beams or hovering craft technology.
That resemblance is strengthened by three overlapping effects:
- the optical pillar itself, [noaa.gov]noaa.govtypes of weather phenomena20 Sept 2023 — Also called "diamond dust", ice… The shape of the individual ice crystals causes the "light pillar" optical effect abov…
- fog concealment,
- and human depth-perception failure in darkness.
The result is not a fake sighting but a layered atmospheric illusion built from real physical optics. For AI-assisted UFO investigation, recognising this layered mechanism is more useful than simply labelling the event “debunked”. The critical task is reconstructing how the environment transformed an ordinary light source into something that plausibly looked airborne and anomalous to the witness at the time.
Endnotes
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Source: atoptics.org.uk
Title: Light Pillars
Link: https://www.atoptics.org.uk/halo/lpil.htmSource snippet
Atmospheric OpticsColumns of light apparently beaming directly upwards from unshielded (and wastefully polluting) lights are sometimes vi...
-
Source: Wikipedia
Title: Light pillar
Link: https://en.wikipedia.org/wiki/Light_pillar -
Source: weather.gov
Link: https://www.weather.gov/ggw/GlossaryISource snippet
eratures in a stable atmosphere. Ice Fog. (Also called ice...
-
Source: psl.noaa.gov
Title: Glittering Light on Water
Link: https://psl.noaa.gov/outreach/education/science/glitter/Source snippet
Physical Sciences Laboratory - NOAAby HGP are Formed · 1999 · Cited by 15 — Glitter patterns on water are similar to vertical light pilla...
-
Source: noaa.gov
Title: types of weather phenomena
Link: https://www.noaa.gov/jetstream/synoptic/types-of-weather-phenomenaSource snippet
20 Sept 2023 — Also called "diamond dust", ice... The shape of the individual ice crystals causes the "light pillar" optical effect abov...
-
Source: atoptics.co.uk
Title: Lower sun pillars
Link: https://atoptics.co.uk/blog/lower-sun-pillars/Source snippet
Atmospheric Optics16 Dec 2024 — The lower pillars in mountain valleys are best after dawn when the valley is filled by an ice fog after a...
-
Source: atoptics.org.uk
Link: https://www.atoptics.org.uk/fza260.htmSource snippet
Sun, moon, planet and light pillars - Atoptics Highlights OPODIn cold weather when there is low or ground level diamond dust they also ma...
-
Source: weather.gov
Link: https://www.weather.gov/Source snippet
National Weather ServiceFire Weather Concerns and Severe Thunderstorms through the Weekend · ACTIVE ALERTS · FORECAST MAPS · RADAR · Stan...
-
Source: weather.gov
Link: https://www.weather.gov/arx/why_halos_sundogs_pillarsSource snippet
What Causes Halos, Sundogs and Sun Pillars?Sun Pillars appear as a shaft of light extending vertically above the sun, most often at sunri...
-
Source: Wikipedia
Title: National Oceanic and Atmospheric Administration
Link: https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_AdministrationSource snippet
National Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA /ˈnoʊ.ə/ NOH-ə) is a United S...
-
Source: atoptics.co.uk
Title: Light Pillars
Link: https://atoptics.co.uk/blog/light-pillars/Source snippet
Atmospheric Optics16 Dec 2024 — Light pillars, a captivating atmospheric optical phenomenon, have been observed during extremely cold wea...
-
Source: lwpetersen.com
Title: Lee Petersen Light Pillars
Link: https://www.lwpetersen.com/atmospheric-optics/light-pillars/Source snippet
Lee PetersenLight Pillars - Atmospheric Optics - Lee Petersen29 Apr 2020 — Light pillars are caused by ice crystals reflecting relatively...
-
Source: reddit.com
Link: https://www.reddit.com/r/atoptics/comments/1q15jfl/diamond_dust_halos_in_flashlight_beam_to_start/Source snippet
after midnight (22° ring, sundogs, pillar, parhelic circle)...
-
Source: photonews.ca
Title: ice crystals
Link: https://www.photonews.ca/ice-crystals/Source snippet
, Diamond Dust & Light Pillars: A Night I'll Never...22 Jan 2018 — Light pillars are an atmospheric phenomena created when tiny ice crys...
Additional References
-
Source: facebook.com
Link: https://www.facebook.com/AccuWeather/posts/have-you-ever-seen-diamond-dust-before-accuweather-anna-azallion-explains-the-sp/1235037021814275/Source snippet
Have you ever seen diamond dust before? AccuWeather...Diamond dust is also responsible for beautiful optical phenomena like sun dogs, ha...
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Source: facebook.com
Link: https://www.facebook.com/NickDunnWX/posts/caught-this-on-my-way-back-into-work-this-evening-light-pillars-happen-when-ligh/872977385540638/Source snippet
Meteorologist Nick DunnLight pillars are an optical phenomenon and are created when lights are reflected by hexagonal ice crystals. The s...
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Source: facebook.com
Link: https://www.facebook.com/MeteorologistRossEllet/posts/who-else-saw-this-sunday-night-no-we-were-not-invaded-by-alien-spacecraft-this-w/1462856031865716/Source snippet
Meteorologist Ross ElletThis can happen from diamond dust (ice crystals that form under a clear sky), and ice fog, or a very light snow d...
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Source: marcorank.com
Title: Atmospheric Optics: The Jena diamond dust halos Impressive atmospheric optics
Link: https://marcorank.com/maua-halo/Source snippet
Atmospheric Optics: The Jena diamond dust halosImpressive atmospheric optics - Diamond dust halos in the south of Jena in Germany between...
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Source: glimpseofinfinity.com
Title: ice crystals diamond dust light pillars a night i ll never forget
Link: https://glimpseofinfinity.com/tutorials/ice-crystals-diamond-dust-light-pillars-a-night-i-ll-never-forget/Source snippet
Ice Crystals, Diamond Dust & Light Pillars: A Night I'll Never...17 Jan 2024 — Light pillars are an atmospheric phenomena created when t...
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Source: theweathernetwork.com
Title: when the skies comes alive the magic of ice crystal displays
Link: https://www.theweathernetwork.com/en/news/science/explainers/when-the-skies-comes-alive-the-magic-of-ice-crystal-displaysSource snippet
When the skies come alive: The magic of ice crystal displays28 Jan 2026 — On cold, sunny days, tiny ice crystals in the atmosphere can cr...
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Source: newsweek.com
Title: bizarre ice crystals light pillar vermont 1850812
Link: https://www.newsweek.com/bizarre-ice-crystals-light-pillar-vermont-1850812Source snippet
Photo Shows Bizarre Ice Crystals Form Over New England8 Dec 2023 — When the crystals align horizontally, they create the illusion of a ve...
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Source: facebook.com
Link: https://www.facebook.com/AccuWeather/posts/glowing-ice-pillars-light-up-the-manitoba-sky-%EF%B8%8Falso-known-as-light-pillars-this-/1296730468978263/Source snippet
mirrors, reflecting and scattering the light in a vertical column.Read more...
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Source: instagram.com
Link: https://www.instagram.com/p/DUFDt0yDZUd/Source snippet
The hexagons act as tiny mirrors. Upward-aimed beams of light...Read more...
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Source: nationalgeographic.com
Title: 150114 ice halo weird weather phenomena science
Link: https://www.nationalgeographic.com/science/article/150114-ice-halo-weird-weather-phenomena-scienceSource snippet
'Heavenly' Ice Halos Form Over New Mexico—What...Jan 15, 2015 — The glaring blob of light to the right of the pillar is called a sun dog...
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