IMO that you would need a clear lens in front of the Yellow Led.
You could saw off the single turn signal lens and replace it with a piece of clear plexiglass.
I am currently working on a completely clear rear lens set for my 68, I have a red Led array at the back.
Modified 68 Mustang convertible, 331,AOD, EPAS, MCA Red Grille Medallion, driven class. 2014 MCA Pinnacle Award
05 Mustang, MCA Grand National Gold (sold)