Whats the difference between Sylvania Cool Blue, Nokya Arctic White and PIAA?
Although the name implies a blue color, Sylvania Cool Blue bulbs are NOT blue; they simply shine white light at a lower wattage than the PIAA brand bulbs just like the Sylvania SilverStars. As for those PIAA bulbs, they shine a bright white light with increased output thanks to some nifty PIAA-exclusive technologies, such as XTRA and Super/Xtreme White. And finally, the Nokya Arctic White bulbs, which shine a bright white light with a lite blue tone (all thanks to an intense blue coating on the bulb).
