The 3157LL bulb is the long-life version of the 3157k. Same bulb but will last longer.
A 3157LL means 3157 Long Life, some stores carry it as 3357 bulb or a Heavy Duty 3157.the filament is stronger in the LL bulb.
LL stands for " long life " - more expensive , but supposed to last longer
3157 is the bulb type, the "K" means the bulb is filled with the inert gas Krypton.
Candle power, one is brighter than the other and also gives off more heat.
3157LL
3157LL
Essentially temperature rating. The K stands for "long life", the X for "high temperature". 3157KX is used especially in some Malibu front turn signals which double as daytime running lights. This means they run hot (in a small enclosure). For other applications the KX and LL can be used interchangeably, but in the above the KX lasts a lot longer than LL.
Loose bulbs will yield better plants.
The difference between the two bulbs is that energy saving bulbs have murcuary in them which lowers the amount of electricity they require and consume.
Halogen light bulbs are what has been around for a very long time. Incandescent bulbs are new and are more energy efficient.
by the more amount of electricity the bulb needs and how big it is the bulb.
The 0 and the 3 obviously.