The two bulbs are of equal power. It means that they consume equal amount of energy per unit time.Now, as the frequency of blue light (fb​) is higher than the frequency of red light (fr​),hfb​>hfr​. Hence, the energy of a photon of blue light is more than the energy of a photon of red light. Thus, a photon of blue light requires more energy than a photon of red light to be emitted. For the same energy given to the bulbs in a certain time, the number of photons of blue light will be less than that of red light.∴nr​>nb​ (As the amount of energy emitted from the two bulb is same)