3157 VS 4157 Bulbs | What’s The Difference?

In this report, we’ll be taking a appear at the main variations in between 3157 and 4157 bulbs.

Because of their related naming schemes and design and style, these two bulbs are typically deemed to be interchangeable.

While that is accurate, there are some subtle variations in between the two in terms of functionality and longevity.

The largest distinction in between these two bulbs is lifespan.

Specifically, 4157 bulbs are a newer design and style that is longer lasting than its 3157 counterparts. Furthermore, 4157 bulbs function nominally larger brightness output.

Having tested the vast majority of possibilities for each sorts of bulbs, we can support you make a far more informed choice about which a single to acquire.

Keep reading for far more information on the variations in between 3157 and 4157 bulbs.

3157 and 4157 Bulbs Compared

Power rating

There is a slight distinction in between 3157 and 4157 bulbs when it comes to the energy rating and wattage. 3157 bulbs are rated for 27 watts whereas 4157 bulbs are rated for a slightly larger 29 watts.

Day to day, we did not notice the largest distinction in terms of light output or visibility. However, 4157 bulbs do offer you a bit far more clarity when viewed up close.

Gases employed in the bulb

Being a new design and style of bulb, 4157 bulbs use Krypton gas in the bulb which permits for far better, far more clear light output, and extended lifespan when compared to 3157 bulbs which do not have Krypton gas in the bulb.

Brightness

Our testing concluded that the distinction in brightness in between these two bulbs is not that noticeable in the true planet. However, there is a distinction on paper. 4157 bulbs are rated to create a couple far more lumens than 3157 bulbs.

However, we would like to reiterate that the distinction in brightness alone ought to not influence your getting choice when it comes to these bulbs.

Lifespan

The most noticeable distinction, and a single that ought to undoubtedly be below consideration when attempting to pick in between these two bulbs, are their lifespans.

3157 bulbs are an older design and style of bulb and do not final as lengthy as 4157 bulbs.

4157 bulbs utilise far better components, which are far more resistant to heat and Krypton gas in the bulb which increases bulb longevity.

In reality, 4157 bulbs are rated to final more than 4 instances as lengthy as 3157 bulbs.

Interchangeability

We tested a quantity of various possibilities for each 3157 and 4157 bulbs and identified them all to be interchangeable. They have the identical precise bulb base, albeit created of slightly various components, and the connectors are shaped the identical as effectively.

As for the slight distinction in energy rating, you do not have to be concerned about blowing a fuse or acquiring decreased functionality if you swap bulbs. The wattage of each bulbs is inside allowable tolerances and will not result in any issues.

3157 Bulb Specs

3157 bulbs rank amongst the most frequently employed sizes for turn signal and brake light purposes. Their single filament design and style is complemented by a distinctive socket design and style, facilitating dual functionality – brake/turn and tail light – inside a single bulb.

These bulbs are equipped with a W2.5×16q cap, which normally homes two filaments catering to each low and higher beam functions. However, dual filament lamps are not utilized for turn signals or brake lights due to their varying light output levels. Notably, the light created by the brake/turn and tail functions carries an amber hue, whilst the headlights emit white light.

The bulb’s nominal energy specification, 12 V: 27 / 7 W, represents a single-filament 27-watt bulb drawing 7 watts in a 12-volt method. This energy specification positions the 3157 bulb as a dual-function – brake/turn and tail light – bulb.

Cars equipped with these bulbs typically have separate filaments for each and every function. The brighter 27-watt filament is utilized for brake and turn signals, whilst the tail lights use the 7-watt filament.

Advantages of this lamp consist of:

• Its versatility, enabling it to serve as turn signals, brake lights, and tail lights.
• Its exceptional brightness, generating it excellent for turn signal or brake light applications.
• Its socket design and style that permits for dual functionality – brake/turn and tail light – inside a single bulb.

On the downside:

• The bulb lacks clear or smoked lens variants, rendering it unfit for backup light applications.
• The 3157 bulb is not legal in all states. Some jurisdictions need separate bulbs for turn signals and brake lights.

4157 Bulb Specs

4157 bulbs not only boast a longer lifespan compared to normal lightbulbs but also exhibit superior durability against put on and tear. They serve as the ideal selection for each interior and exterior illumination demands of your automobile.

The 4157 lamp possesses a W2 5x16d base, operates at a voltage of 12V, and utilizes 28.54W of energy. This level of nominal energy characterizes the bulb as dual-functional, serving each as a turn signal and brake light. The 4157 model measures two.five inches in width and 16mm in length.

The design and style involves two filaments, committed to low and higher beam functionality. The light created by the brake/turn and tail functions exhibits an amber hue, whilst the headlights emit a white light.

Benefits of employing this lamp consist of:

• Its colour temperature closely mirrors organic sunlight, providing a soothing visual knowledge.
• Its impressive lifespan signifies a intelligent and sturdy investment.
• Its versatile usage covers turn signals, brake lights, as effectively as tail lights.

However, there are a couple of prospective downsides to contemplate:

• The emitted light is notably vibrant, which may possibly not be excellent if a subtler illumination impact is preferred.
• The 4157 model does not come with clear or smoked lens possibilities, limiting its utility as a backup light.

Conclusion

So, to sum up, 3157 and 4157 bulbs are really related and only differ in a handful of methods.

After testing most of the possibilities for each and every bulb, we have concluded that of the two, 4157 bulbs are the superior selection. No matter how tiny, there is a distinction in brightness and energy of the bulb.

But what actually seals the deal is the distinction in longevity. 4157 bulbs function a 4 instances longer lifespan, compared to 3157 bulbs. That implies you will have to replace bulbs much less typically, whilst nonetheless enjoying as very good as, if not far better functionality than with 3157 bulbs. All mentioned and carried out, 4157 bulbs offer you the very best bang for your buck.