# World Light Pollution Map

**URL:** <https://discourse.okcastro.club/t/world-light-pollution-map/130>\
**Category:** General\
**Tags:** advice\
**Created:** [August 14, 2023, 3:49pm UTC](https://discourse.okcastro.club/t/world-light-pollution-map/130 "2023-08-14T15:49:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![DaveNH6SM](https://discourse.okcastro.club/user_avatar/discourse.okcastro.club/davenh6sm/32/112_2.png) [@DaveNH6SM](https://discourse.okcastro.club/u/DaveNH6SM)\
**Post date:** [August 14, 2023, 3:49pm UTC](https://discourse.okcastro.club/t/world-light-pollution-map/130/1 "2023-08-14T15:49:54Z")

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Interactive World Light Pollution Map.

> **[Light Pollution Map](https://www.lightpollutionmap.info/)**
>
> Interactive world light pollution map. The map uses NASA Black marble VIIRS, Sky brightness, Aurora prediction, observatories, clouds and SQM/SQC overlay contributed by users.

* * *

Dave  
NH6SM  
OKCAC/CRO Phone Number  
(405) 418-6444

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**Author:** ![mpsurge](https://discourse.okcastro.club/user_avatar/discourse.okcastro.club/mpsurge/32/952_2.png) [@mpsurge](https://discourse.okcastro.club/u/mpsurge)\
**Post date:** [August 15, 2023, 12:20am UTC](https://discourse.okcastro.club/t/world-light-pollution-map/130/2 "2023-08-15T00:20:32Z")

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Love this site, used it quite a bit. But I can’t find how current it is.

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**Author:** ![Randy](https://discourse.okcastro.club/user_avatar/discourse.okcastro.club/randy/32/1664_2.png) [@Randy](https://discourse.okcastro.club/u/Randy)\
**Post date:** [November 5, 2023, 11:01pm UTC](https://discourse.okcastro.club/t/world-light-pollution-map/130/3 "2023-11-05T23:01:29Z")

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I used the map you listed and it says CRO is a bortle 4. Has anyone taken readings that can corroborate with this information?

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**Author:** ![DaveNH6SM](https://discourse.okcastro.club/user_avatar/discourse.okcastro.club/davenh6sm/32/112_2.png) [@DaveNH6SM](https://discourse.okcastro.club/u/DaveNH6SM)\
**Post date:** [November 6, 2023, 2:44pm UTC](https://discourse.okcastro.club/t/world-light-pollution-map/130/4 "2023-11-06T14:44:41Z")

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Here is some information that is still on the old forum.

I took a reading last night at CRO 1/29/2022 and got 20.79. This is better than the reading I got in 2015. Could full cutoff LED’s be helping? Or is it more have to do with sky conditions?

10/30/2021 20.45  
9/5/2021 20.64  
4/10/2021 21.14 not sure what was happening this night it looks like we had a really good sky. Maybe a power outage in the area from a storm will have to research this.  
10/10/2020 20.58  
5/20/2017 20.88

1/18/2015 20.53 this is my oldest reading and you can see it hasn’t changed much from last night.

It looks like straight overhead hasn’t changed much. Last night I was looking at the horizon and it seemed to be fairly good. The gas rigs seemed to be not as bad as they have been. One thing I noticed when I was leaving is the compression station that used to be all lite up only had 2 lights on. It looks like they were closed down.

My last reading on 1/14/23 was 20.50 which is bortle 4.

CLASS TITLE NELM APPROX. SQM MAG/ARCSEC2  
1 Excellent dark-sky site 7.6–8.0 21.99–22.0  
2 Typical truly dark site 7.1–7.5 21.89–21.99  
3 Rural sky 6.6–7.0 21.69–21.89  
4 Rural/suburban transition 6.1–6.5 20.49–21.69  
5 Suburban sky 5.6–6.0 18.5–19.25  
6 Bright suburban sky 5.1 - 5.5 18.94-19.50  
7 Suburban/urban transition 4.6–5.0 18.38-18.94  
8 City sky 4.1 - 4.5 \<18.38  
9 Inner-city sky 4.0 \<18.38

At Lake Hefner WSP on Friday got a 17.72