Yes, I bought some for my wife's bow. 38#@29" She pull 29"+or-1/2" Dale Dye recurve, 8 strand FF SBD string.
I can tell you that the X-lites are to stiff for her. She normally shoots a 30" 600 spine with stock insert & 125-150gr point.
With the AD X-lites we needed them long & they wern't weak enough until we got 300gr field points up front.
By that time we were at 650gr finished arrow, WAY to heavy for her 38# she likes shooting 400-450gr finished arrow #
The Trad lites work great for me out of 55#@27" but the X-lites show a little to weak.
So I'm guessing the X-lites would be good for say 45#-50# bows depending on the variables, point weight, draw length, string, arrow length & bow type.
Just my 2 cents
Ryan