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) |