One Watt is equal to 1 J/s. Assuming that 5.0% of the energy output of a 75 watt lightbulb is visible light and the average wavelength of the visible light is 550nm how many photons are emitted by the lightbulb per second?

One Watt is equal to 1 J/s. Assuming that 5.0% of the energy output of a 75 watt lightbulb is visible light and the average wavelength of the visible light is 550nm how many photons are emitted by the lightbulb per second?