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light fall-off by distance · stops · ratio · inverse-square law
[
mode
]
(•)
solve intensity
( )
solve distance
[
distance unit
]
( )
m
(•)
ft
( )
cm
( )
in
[
known light
]
intensity at d₁
d₁ (ft)
[
new distance
]
d₂ (ft)
[
result
]
intensity at d₂
25.00
same units as input
stops change
−2.00 stops
darker · open up to compensate
ratio
25.00%
of original brightness
[
log
]
>
ready