Vega Calculators
Intensity and Range
Effective intensity, given range by night
Effective intensity, given range by day
Range by night, given effective intensity
Range by day, given effective intensity
VLB-36 LED Marine Beacon
VLB-36 Solar Calculator
VLB-67 LED Marine Beacon
VLB-67 Solar Calculator
VRB-25 Rotating Beacon
Printed Tables
Download tables for determining day and night range of signal lights, and formulas for use with rotating and flashing lights.
References
IALA Recommendation E-200 on Marine Signal Lights, Edition 1, December 2008.