Electronic – Lumens vs Watts


What of this words define the intensity of the light of a bulb? Lumens or watts? I don't know if I am right. Lumens means intensity of the light and watts the consumption of the bulb

Best Answer

Lumen is the unit of luminous flux and expresses the amount of visible light emitted by the source. Watts can be used to describe both the energy consumption or the radiant flux, be it visible or invisible.

It is possible to calculate between watts and lumens, in that case spectral sensitivity of the human eye and spectrum of the source have to be taken into account because some colours are more visible than others.

But no bulb has specified radiant flux, that figure always means power consumption.