| After our original discussion, I expended way too many brain cells on thinking about this and came up with this priority order:
1) Turn blinker should never be allowed to be geometrically overlaid with brake signals. I'm looking at you, Cadillac.
2) on and off state of the turn signals while blinking should never be equal to the not turning state. For analog signals, having the current vs. resistance of the bulb going through a mostly sine wave state suffices (though incredibly few cars manage this very cheap solution). For LEDs, when "blinking", the off state should be some percentage (25%?) of the lit state (by number of LEDs lit or by current-limited brightness - NOT by time-sliced brightness, which is annoying when glancing around the road). The Roadsters lights fall short here. If combined with 1, the turns signals officially suck. I'm looking at you again, Cadillac.
3) The color should be amber. I've seen red turn lights that are better than amber ones, but the above two things being equal, amber wins. Screw up 1 and 2, though, and amber won't make up for it. The US Roadster misses this, too. Ah, well. But I suspect an anonymizer and ordering parts from the Tesla European store (eventually) may solve this.
It just stuns me that the US hasn't already mandated amber. I'd like it to mandate non-co-location and the brightness thing as well, but I don't expect our government is that smart or quick. | 
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