\textbf{174.} A $200\,\text{W}$ lamp emits violet light with wavelength $400\,\text{nm}$. Another $200\,\text{W}$ lamp emits yellow light with wavelength $600\,\text{nm}$. How many photons does the yellow lamp emit per second compared to the violet lamp during the same time?
$$\frac{2}{3} \;(1) \qquad 1 \;(2) \qquad \frac{3}{2} \;(3) \qquad 2 \;(4)$$