added these to the high and low beam of my Jaguar, makes a very simple and valuable upgrade. Difficult to measure quantitatively if there is the claimed 130% additional illumination, that said, these are a vast improvement in visibility from the drivers point of view. They provide a very defined and bright visible area. I'm sure from outside the vehicle they can be seen with ease, so overall there is a safety gain for comparatively low cost. A very worthwhile investment.
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