light flux

light flux meter

absorbed radiant flux

radiant flux

radiant flux density

spectral radiant flux

(LED) Light Emitting Diode

[endoscopic]cold light source

[laser] light scattering detector

100% low-floor light rail vehicle

1550 nm light transmission of sub-carrier modulate trunk

193nm light source

2MQES light field

3-chip light engine

3rd generation synchrotron light source

4f cross light path

4MFSS light field

55Q light rail

70% low-floor light rail vehicles

820 nm light absorbance