it's cheap and as good as I thought maybe I will buy next time

There is a actually a noticeable difference between Lemon Yellow and normal Yellow. However, what didn't make sense to me was the fact that Lemon Yellow can actually be made by mixing Orange with normal Yellow. Yes it takes some effort and patience, but knowing that you can just make this color makes the paint option seem kind of redundant. Then again, there's probably a model out there that needs this exact shade of yellow and it's just convenient to have it premixed on hand. The quality is excellent. I just use Tamiya's recommended 2:1 (paint:thinner) ratio for airbrushing. It works great and like all Tamiya acrylics it is easy to use. Even rookie airbrushers shouldn't be able to mess this up (too much) :P Oh, it's also easier to get Gundam Yellow by using Lemon Yellow as a starting point, so I guess there is in fact a purpose to this color.

Excellent paint good coverage dries true great value