Lime or Lemon?

I had bought a "meyer" lemon tree back in April and it has since bloomed and set fruit in may. Now the the fruit has kept growing at a constant rate now at about pingpong ball or bigger but hasn't seemed to grow in size for about a month or two I was wondering could my green lemons actually be limes? My tree has just finished blooming again and putting out a bunch of new growth. Here are some pics:

http://i174.photobucket.com/albums/w104/addy113/photo1.jpg

http://i174.photobucket.com/albums/w104/addy113/photo2.jpg

 

The new growth will have a purple tinge if it's a lemon.

 

The blossoms have purple on them, and if so how long is it for a lemon to mature?

 

It depends on the growing conditions. Could be up to a year.

 

I have an "Improved" Meyer & a Eureka lemon trees and both have several green fruit on them. They've been in my greenhouse but now that we're finally having a stretch of hot sunny weather, I brought the Eureka out into the garden where it'll have full sun all day.