Effective Intensity (given range by night)
Effective Intensity (given range by day)
Range by Night (given effective intensity)
Range by Day (given effective intensity)
VSOL-40 Current Calculator
VLB-44 Current Calculator
VLB-36 Solar Calculator
VLB-5X Solar Calculator
VLB-5 Solar Calculator
VLB-B Solar Calculator
VLB-3 Solar Calculator
VLB-2 Solar Calculator
VLB-1 Solar Calculator
Download tables for determining day and night range of signal lights, and formulas for use with rotating and flashing lights.
IALA Recommendation E-200 on Marine Signal Lights, Edition 1, December 2008.