Solar power roughly equivalent to the light from ten 100

Question

Solar power roughly equivalent to the light from ten 100 watt light bulbs falls on each square meter of the Earth's surface. Using the fact that Earth is 1.5 X 10¹⁰ from the sun, and that the sun radiates energy equally in all directions, estimate how many 100 watt light bulbs are equivalent to the sun's total power output.