| A little while ago Overboost.com did an experiment using light sensor equipment and tested the PIAA's vs. stock etc.... The regular blue PIAA's according to the light gathering sensors did POORLY. Source: [ http://www.overboost.com/story.asp?id=102 ] [ www.overboost.com ] The SilverStars on the other hand were highly rated in Europe. Then, they brought it to the US market just recently. Sources: [ http://www.rockcrawler.com/techreports/sylvania_silverstar/index.asp ] [ www.yahoo.com ] (search) lots of stuff.
And lastly, a related source: [ http://www.consumerreports.org/main/detailv2.jsp?CONTENT%3C%3Ecnt_id=302617&FOLDER%3C%3Efolder_id=113261&bmUID=1063644175790 ]
 
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