Light Level Calculator
Illuminance calculation for night operations (18:00 LT - 07:00 LT)
Provided by
Helicopter School Association
Location (City/ICAO)
Year
Calculate
Export CSV
Use Manual Coordinates (Offline)
Latitude
Longitude
Timezone (IANA)
LOCATION:
TIMEZONE:
_
(View Map)
> -6° (Day)
86-100
61-85
36-60
18-35
17 (Starlight)
Summer (DST)
Winter (STD)
⚠ Data without guarantee
Values
100
Full moon in Zenith
17
Starlight only
0
Absolute darkness
Cloud Corrections (Subtract)
High clouds OVC CS
- 3%
Medium clouds OVC AS
- 11%
Low clouds OVC ST
- 13%
Solid clouds OVC NS
- 17%
Operational Parameters
Visibility, Precip, Humidity
Cloud base, Artificial lighting
Crew composition, Human performance
Date (LT)
18
19
20
21
22
23
00
01
02
03
04
05
06
07
Moon
Enter location (or manual coordinates) and year to start.