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Dunno. You need some proper ABA testing results to see the effect on mileage.
I expect the full black ones have little to no positive effect.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.17 Gmeter or 0.1 Mmile.
“We all know that light travels faster than sound. That's why certain people appear bright until you hear them speak.” ― Albert Einstein
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