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Technical Discussions
Kulbhushan Jetly
Director,
3E CORPORATION, India, Joined Aug 2008, 2

Kulbhushan Jetly

Director,
3E CORPORATION,
India,
Joined Aug 2008
2
11:35 Jun-22-2014
conversion of Lux to cd/msq

I am not able to find proper way of conversion of brightness of light as measured in Lux by a Lux meter to cd/msq.
We have measured the light intensity as 400000 lax. How much this will be in cd/m sq

    
 
 Reply 
 
Jon Wallis
NDT Inspector, -
Netherlands, Joined Feb 2010, 626

Jon Wallis

NDT Inspector, -
Netherlands,
Joined Feb 2010
626
08:09 Jun-23-2014
Re: conversion of Lux to cd/msq
In Reply to Kulbhushan Jetly at 11:35 Jun-22-2014 (Opening).

I don't think this is possible as the two units measure different things. Lux is illuminence and candela (cd) is light intensity.
Is 400000 lux correct?

    
 
 Reply 
 
Gowrisanthosh Palika
NDT Inspector,
Royscan engineering pte ltd, Singapore, Joined May 2008, 52

Gowrisanthosh Palika

NDT Inspector,
Royscan engineering pte ltd,
Singapore,
Joined May 2008
52
11:22 Jun-24-2014
Re: conversion of Lux to cd/msq
In Reply to Kulbhushan Jetly at 11:35 Jun-22-2014 (Opening).

Lux to candela calculation with distance in meters
The luminous intensity Iv in candela (cd) is equal to the illuminance Ev in lux (lx),
times the square distance from the light source d2 in square meters (m2):
Iv(cd) = Ev(lx) × (d(m))2

so cd=lux * meter square

here is the calculator
http://www.rapidtables.com/calc/light/lux-to-candela-calculator.htm

    
 
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