Find the luminous flux of 10 W source of 600 nm. The relative luminosity at 600 nm is 0.6.

Explanation

The luminous flux of a1W of 55=m=685 lumen. Thus, the luminous flux of a 10 W source of 555=6850 luen. The luminus flux of a 10 W source of 600 nm is, therefoe `0.6xx6850` lumen =4110 lumen.