3157 Light Bulb Replacement Guide

Common bulb fittings

9005 H11 H7 H1 9006 194 7443 9003 H13 H8 921 DE3175 9004 168 9012 4157NA 9007 3156 H3C 5200 D4S Show more

3157R Characteristics And Hallmarks

The P27/7W bulb also known as 3157R, is a dual-contact bayonet base light bulb used for turn signal, brake, and tail lights on vehicles. The 3157R has a slightly larger glass envelope than the standard 3157 light bulb, allowing for more intense light output. The R suffix indicates that the bulb has a rough service coating which makes it more resistant to vibration and shock.

With two filaments, this bulb can function as both a turn signal light and a brake light. When the turn signal is engaged, only one of the filaments is lit, giving off a dimmer light. This lets other drivers know that the vehicle is turning. When the brakes are engaged, both filaments are lit, giving off a brighter light. This warns other drivers that the vehicle is stopping.

This bulb has a nominal power of 12 V: 27 / 7 W, a brightness level of 1800 Lm, a color temperature of about 6000K, and a lifespan of around 50,000 hours. With such characteristics,  it is no wonder that the 3157R is one of the most popular types of automotive light bulbs.

It is usually used as signaling, cornering, and reversing lights, so that any driver behind you can see your car's intentions. Such a usage allows the 3157R to increase road safety. Overall, the 3157R light bulbs are made with high-quality materials and advanced technologies to ensure optimal performance and durability.

What Color Is The 3157R Bulb?

This red LED bulb would be perfect for your car because it will make it look sporty and modern. And you don't have to worry about getting pulled over for having a non-standard bulb because it is street-legal. So go ahead and make your car stand out from the rest with this unique and stylish 3157R bulb.

Are LED Reversing Lamps Legal?

Yes, all LED reversing lamps are legal in the UK. This includes the 3157R bulb. So if you're looking for a safe and stylish way to improve your car's visibility, then this is the perfect choice for you. Moreover, selecting LED technology for your car's reversing lamps can also help you save on fuel costs.

For example, when you use xenon or halogen bulbs, they tend to heat up quickly. This causes the bulb to use more power and produce more heat, which in turn can cause the fuel to evaporate faster. LED bulbs, on the other hand, don't heat up as quickly, so they use less power and produce less heat. As a result, they can help you save money on fuel costs.

So if you're looking for a way to improve your car's safety and style, while also saving money, then LED reversing lamps are a great choice. And the 3157R bulb is one of the best options on the market.

What Light To Choose For Registration Plate Lamps?

Now you know, that the 3157R bulb may be used for the rear registration plate lamps. But what is the general rule for choosing the light for this purpose? Actually, there are no restrictions. You can choose any color you like, as long as it is not blue or yellow.

In many states, you will find that the requirements for license plate lights are very specific. They often call for white light, but in some cases, they allow other colors as well. So it is always best to check with your local DMV to find out what the requirements are in your state.

But overall, the 3157R bulb is a great choice for registration plate lamps, because it is legal, stylish, and safe. So go ahead and make your car stand out from the rest with this unique and stylish 3157R bulb.

Final Words

The 3157R bulb is a great choice for many different applications because it is legal, stylish, and safe. So go ahead and make your car stand out from the rest with this unique and stylish 3157R bulb.