A website touting the Sylvania SilverStar headlight bulb says it provides "up to 30 percent" greater visibility down the road. That sounds impressive until you read the fine print: "compared with ...
Actual 3K or 12.5K color temperature (kelvin) is the average measured color temperature of 10 bulb samples. Those with 2700 K are closest to incandescent bulbs; ones with 3000 K are similar to ...