@Flenser - so the color you are showing is more yellow then yellow green but that could be just the way you took the pic. And that is after 15 mins correct (not questioning your experience with labmax just want to clarify). Thanks!
It actually changes quite a bit sooner, but I check it again after 15 minutes to make sure it is still the correct color. I never used the UV test on it. I think Labmax posted that part recently. The color in the pic I posted matches the color in the pic on the labmax site.