HomeConversion Units for Light

Conversion Units for Light

Conversion Units - For Light

RADIANT FLUX

1 W (watt) =
=
683.0 lm at 555nm
1700.00 scotopic lm at 507nm
 
1 J (joule) =
=
=
1 W-s (watt-second)
107 erg
0.2388 gram-calories
 

LUMINOUS FLUX

1 LM (lumen) =
=
1.464 x 10-3 W at 555nm
1/4•Πcd (candela) if isotopic
 
1 lm-s =
=
1 T (talbot)
1.464 x 10-3 J at 555nm
 
IRRADIANCE
1 W/cm2 =
=
=
104 W/m2
6.83 x 106 lux at 555nm
14.33 g-cal/cm2/minute
 
ILLUMINANCE
1 lm/m2 =
=
=
=
=
1 lux
10-4 lm/cm2
10-4 ph (phots)
9.290 x 10-2 lm/ft2
9.290 x 10-2 fc (foot-candles)