These are the classic fog lights used on Porsches from 1960 through 1968. This is a high quality reproduction at a fraction of the cost of the Hella fog light for 356B (1960-1963), 356C (1964-1965), 911 (1965-1968) and 912 (1965-1968) models. Bulbs are included.
Clear or Amber (Selective Yellow) Lenses?
Selective Yellow is not just cosmetic. It's a color with special optics characteristics. It gained prominence as it was mandated for all headlights in France for many years.
Wikipedia: The intent of selective yellow is to improve vision by removing short, blue to violet wavelengths from the projected light. These wavelengths are difficult for the human visual system to process properly, and they cause perceived dazzle and glare effects in rain, fog and snow,
If you would like to geek out you will find an in-depth article by automotive lighting expert, and Audette Collection friend and consultant Daniel Stern HERE.