The Sylvania Ultra-LED 100W LED20A21/DIM/0/827 ... Claimed life: Claimed life is how many years the manufacturer says the bulb will last based on 3 hours of use per day. Brightness: Brightness ...

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 ...