Light...in the past...has referred to ivory-colored materials. I think there was a problem in the past with the very light materials exposing the tang. Also: Some of the old white crap (we actually used to list it by this name) was poor quality. If you are speaking of AGM...and if it is the "exact" same AGM it is probably a "go", "BUT" (I know...I know) the laminated AGM micarta that is similar and not the same? I think not. Hope this helps. The shop will not install bright yellow for the same reasons as have been explained here.
Best, Capt. Chris