The difference between the bulbs 3157LL and 3157K lies in their intended use and specifications. The 3157LL bulb is a long-life version, designed to have a longer lifespan compared to the standard 3157 bulb. On the other hand, the 3157K bulb denotes a specific color temperature, typically a cool white light output. It is important to consider these differences when selecting the appropriate bulb for your application.
3157LL
3157LL
3157 is the bulb type, the "K" means the bulb is filled with the inert gas Krypton.
3157 is the bulb type, the "K" means the bulb is filled with the inert gas Krypton.
3157K coupe 3156K sedan
You can unscrew a light bulb.
According to the 1996 Ford Windstar Owner Guide : Brakelamp / taillamp takes ( # 3157K bulb ) Also , the High-Mount Brakelamp takes ( # 912 bulb )
it is difference between wet bulb temperature and dry bulb temperature.
The difference between wet-bulb and dry-bulb temperature is called the Wet-Bulb Depression. It is a measure of air humidity, with a larger depression indicating higher humidity levels.
Sylvania 4057k Some stores will have them listed as 4057LL... but it's the same I've seen the Sylvania 3157LL bulb work as well. Here's a visual step-by-step of the process:
power difference