Everyone has talked about the green centreline lights on the taxiway. How many of them would have been visible, with four large aircraft lined up on top? Is it possible that only fragments of green line would have been discernible?
I have asked before, is SFO having "modern" LED or "traditional" light bulb lighting? LED typically have a significantly smaller angle under which they shine their light. Is green light produced by green LED or is it composed from a combination of blue and yellow? Is the colour that clear from any angle? After all the center lights are designed for the aircraft on ground, not for those on approach. Only the approach lights are supposed to be seen from the 3° ILS path.