# LED illuminance estimate
# Scope: On-axis point-source illuminance using supplied luminous intensity.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

intensity = 100 cd
distance = 2 m
incidence = 0 deg

illuminance := intensity*cos(incidence)/distance^2 [lux]

check illuminance target: illuminance >= 20 lux

scenario alternative: intensity = 80 cd