Most “LED” … OEM or Aftermarket … Single, Brake/Turn Signal* Lighting that are now available in the marketplace … will almost certainly be “EPLLA” non-
Remember, common “Light Emitting Diodes” (LEDs), produce only a very directional and very small cone angle of measurable light … usually represented by a tiny ≈20° “Conal Shaped” Output … and that’s all.
This limited and very directional output represents only about one percent of all the directions of output that always emanate from the length and circumference of the typical Incandescent Bulb Filament. This means that over a hundred 20° Cones of Output Light Rays are generated by the typical #1157 or #3157 Brake/Turn Bulb Filament compared to the single ≈20° Conal Output of a typical LED!
This “very limited and very directional, Laser-
*very directional … more or less, straight out
Therefore, by using just a few “LEDs” … where each puts out only a tiny ≈20° Cone of EPLLA qualifying light … the typical, very compact*, 7 or 3-
To solve this inherent “LED” problem, “many” LEDs must be used, and the many used … must be properly lensed so every LED properly projects its’ output within the mandated Test Pattern, and at the same time, not loosing significant output because of “LED Heat Build-