Blip,
I got the same number as you did by using .27 as the radius of the light. If it's really .27 M in diameter, you need to divide by 2 to get the radius, then square and multiply by Pi to get the area. (Or use the square of the diameter and divide by 4 at the end.) Assuming the mistake wasn't in your post, the value you got is 4 times too high. (Of course, that's per light.)