Which one should I buy: the 3157A Vs 3157Na In 2022?

The 3157A Vs 3157Na lightbulb is one of the most common debates among homeowners.

This debate has been going on for decades, with no clear winner so far. The question remains: which one should I buy? This blog post will explore this dilemma in more depth.

Let’s jump into the article and see what we have got for you.

3157A Vs 3157Na: The Similarities

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When it comes to 3157A and 3157Na, there’s a lot that is the same. For example, both types of bulbs are typically used in desk lamps and other small fixtures.

Both use an A-line filament design which produces light with less glare than other designs. And they’re both available as either screw-in or bayonet bases for easy installation.

Finally, they both provide a similar level of illumination. Both are relatively easy to install, and the most beneficial part of using either one is reducing your environmental impact. Finally, both bulbs contain mercury.

3157A Vs 3157Na: The Differences

The 3157A and 3157Na light bulbs are two of the most common types on the market. The former is a standard incandescent bulb, while the latter is an environmentally-friendly halogen type that lasts much longer than other varieties.

Both have their pros and cons, so it’s essential to know which one you’re looking for before making your purchase.


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The 3157A is the same Phillips bulb that’s been around for years, but with one difference. The “A” stands for amber color because it gives off a softer yellow hue than traditional light bulbs.

If you want to replace an old, existing bulb in your car or home, this is what you’re looking for. It’s very much like the standard 3157 bulbs in every other way.

The 3157Na stands for “natural,” and it’s a little more expensive than its predecessor. The price tag is because it lasts up to three times longer, although light color and brightness remain the same.

Gas Mixture and Price

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The 3157A incandescent light bulb has a warmer yellow hue compared to the 3157Na natural halogen bulb. The latter emits a whiter light and is a more energy-efficient but much more expensive choice.

The difference between the two bulbs has to do with the gas mixture used in each one. 13 milligrams for the A-type vs. 6 milligrams for the N-type.

The 3157A contains mercury, which is something you want to avoid when making an environmental impact. However, it makes up for it by lasting longer as well as being less expensive.

The 3157Na does not contain mercury and will last longer than the 3157A but at a higher cost.

3157A Vs 3157Na: Which One I Should Buy?

Life Span

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Firstly, while both have a lifespan of about 1 thousand hours, there’s a 10% difference in brightness when comparing them side by side.

The 3157A is a standard incandescent bulb, and the 3157Na is an LED. The life expectancy of an LED bulb is also typically much longer than that of other types, which saves you money in replacement costs over time.

The 3157A comes with a CRI of 82 and an average lifespan of 20,000 hours, whereas the 3157Na has an 80 CRI and 25,000 hours.

For those reasons, as long as you don’t mind a whiter light and doing the occasional replacement for this type of bulb, it is worth going for the 3157A.

However, if your priority is to save money without worrying about replacements too often, go with the 3157Na.


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So what is the difference between these two? The answer lies in their filaments: A-bulbs have tungsten wire while Na-bulbs have sodium wire.

Tungsten gives off a whiter light than sodium, so A-bulbs tend to be more yellow than Na-bulbs.

They also burn at a much higher temperature. But the downside to tungsten is that it melts quickly, so A-bulbs have to be carefully handled by trained professionals because they will overheat and break if you look at them wrong!

Sodium wire doesn’t require this kind of care, but it has a limited lifetime and a lower wattage.

So which one is more powerful? Na-bulbs were rated to use 50 watts at 12 volts, while A-bulbs used 42 watts at the same voltage.

This would be like your car battery started at 40 amps and then only at 30 amps when you used a Na-bulb. It’s a huge difference, and it shows how much more efficient sodium bulbs are.


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The reason that A-bulbs have such a lower wattage is the conservation of energy. When electricity flows through the filament of an A-bulb, it isn’t all used up in lighting the bulb.

Much of it is given off as heat, and the filament has to handle this, or it will burn out. That means that A-bulbs need a higher wattage because they have to dissipate more power without breaking.

It has been said that 60% of the electricity consumed by incandescent lights goes out the window since these lamps give off heat rather than light. This makes them the least energy-efficient bulb type.

Na-bulbs, on the other hand, use the same energy to make light and heat. This means they can use a lower wattage without breaking down.

So if you want to go green and save energy while still using your headlights at night, it might be time to switch from A-bulbs to Na-bulbs!

Color Temperature

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People often hear about color temperature and wonder what it means.

Color temperature measures how much red or blue light is in the white light produced by an electric lamp, with higher color temperatures indicating more incredible amounts of blue content.

The 3157A bulb has a rating of 2700K to 3000K on the Kelvin scale, which falls into the ‘warm’ category that produces yellow-white light similar to candlelight or sunlight at noon.

A rating under 2000K indicates redder than blue content and gives off a bright white appearance like daylight at sunrise or sunset.

The 3157Na bulb has a rating between 4000K to 5000K on the Kelvin scale, which falls into the ‘neutral’ category that produces a color similar to daylight at midday.

A rating of over 5000K falls into the ‘cool’ category and is usually used for car headlights because it increases visibility against road glare.

Therefore, here is some advice from us. Firstly, be sure to consult with someone who knows about color temperature before deciding which one would look best in your room or home.

Due to its lower color temperature, the 3157A gives off a much warmer light than the 3157Na bulb. This makes it better suited for usage in the living room to bring a relaxed feeling or as office lighting where you want less harshness.

The 3157Na bulb gives off a neutral light, which allows it to be used as a substitute for sunlight and is therefore often recommended by doctors and physiotherapists.

The light emitted by 3157Na can be more pleasing to the eye than other bulbs because it emits a softer glow. This means less glare and fewer headaches.

What’s Available In Your House

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3157A is incandescent, and 3157Na is compact fluorescent (CFL).

This means that if you currently have CFL bulbs in your house, then switching to an incandescent bulb will require some changes, like changing out all your fixtures because they won’t work with this new kind of bulb.

If you have incandescent fixtures in your house, then the 3157A would be the best choice for you. However, if you are looking for an energy-efficient lightbulb that can fit into any fixture, the 3157Na would be best for you.

Environment Effects

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The 3157A sodium bulb produces a yellowish light that casts the surrounding area in a warm golden glow. It is often used to create an atmosphere that is both inviting and relaxing.

The 3157Na, however, provides a whiter form of light that does not have a yellowish hue. This type of light is often used for illumination because it does not have the same atmospheric qualities as the 3157A bulb.

Artificial lighting is a common source of both energy consumption and environmental effects.

It is crucial to consider the 3157A Vs 3157Na lightbulb environmental effects when deciding what light bulbs to use in different settings.

Residential lighting can have a significant effect on the amount of energy used in a house. It has been shown that when sodium bulbs are paired with motion detection, brightness can be increased without affecting energy use.

Additionally, these lightbulbs types have also been known to have fewer health effects than other types since low levels of pollutants are emitted from the light source.

In contrast, fluorescent lights have been found to cause migraines and other health issues due to the flickering effect caused by magnetic ballasts.

These are significant differences in environmental effects between 3157A Vs 3157Na lightbulbs. To make a substantial impact on the environment, consumers need to consider their options when making lighting choices.


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There are a lot of factors that go into the brightness of a lightbulb, such as voltage and current.

The 3157A is a halogen lamp with an average light output of 2400 lumens, while the 3157Na is a high-pressure sodium lamp with an average light output of 2000 lumens.

In general, the 3157A provides higher output than the 3157Na as it uses more power. The difference between these two bulbs is minimal as they both operate at their respective target voltage and current for their type.

Spectral Output

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Another factor to consider is the spectral output of these bulbs. Sodium lamps are ideal for applications that involve reading, writing, or viewing documents as they have a high-intensity light in the yellow spectrum.

On the other hand, Halogen lamps provide a more natural lighting environment with their red-orange color temperature. For this reason, halogen bulbs are typically used in applications where color rendering is essential.


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The size of a lightbulb affects the amount of light it produces.

A larger bulb will produce more light than a smaller one, but depending on how much lighting is needed for the given area, you may need to consider other factors like energy efficiency or cost.

A 1357A (the most common type) is about four inches in diameter and provides 2200 lumens, enough for most indoor spaces.

The 1357A is used in projects that require a more powerful light source, but it cannot be connected to most fixtures.

It uses more energy than the 1357Na and emits more heat, making it less energy efficient.

A 1357Na bulb is about two inches in diameter, producing the same lumens as its larger counterpart.

The smaller size allows it to fit more easily into standard household fixtures. However, it also emits less light, and some find the light produced by this bulb too harsh for home use.


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Most people would instead go with the 3157Na as it has a higher CRI, but that is not always the case. While it is true that a high CRI will allow you to see more colors, there are many other factors involved in what makes a light bulb better or worse.

The 3157A emits a warmer and softer light than the 3157Na, so if you have children or pets scared of the harsh lighting of most LED bulbs, then the 3157A might be the right choice for you.

Now that you know the differences between CFLs and LEDs deciding which one to buy is up to you!

If you want a bulb with a high CRI for performing color-sensitive tasks, then go with LEDs. However, if the price is your main concern when buying lightbulbs or needing something brighter, you should go with CFLs.

Why Do People Decide To Switch From 3157A To 3157Na?

The 3157A is a more common type of lightbulb that is present in most households. The 3157Na is an LED lightbulb that has been designed to replace the 3157A.

The 3157Na is more energy-efficient and has a longer life span than the regular lightbulb, saving money in upfront costs and energy usage. With these benefits, it is no wonder there are many pros to switching to the LED lightbulb.

Save Electricity Bills

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One of the most significant benefits of using the 3157Na rather than regular bulbs like the 3157A is that LED bulbs use less energy and cost less electricity.

The operating costs can range from $1.00 for the first year to $7.00 for the sixth year, depending on electricity rates.

The average household could save up to $60 per year by switching from incandescent lightbulbs to LEDs. This is a significant amount of money that can be put towards other bills or savings for younger families.

Longer Lifespan

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The 3157Na also has an extremely long lifespan estimated at over 30,000 hours.

This means that if someone were to leave their lights on for 10 hours every day of the year, they would only have to replace the LED lightbulb every few decades, saving time and money in maintenance costs.

For example, changing a bulb with incandescent bulbs can be a two-person job, and the new lightbulb can range from $3 to $15. This is such an easy task that eradicates most of the benefits of switching to these lights firstly.

However, there are still some issues to switch from 3157A to 3157Na if your house still has the incandescent bulb system.

Some Issues

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One of the most significant issues with LED lights is that they are unavailable in most common household bulbs.

Therefore, most people do not have experience using them. With the use of 3157A lightbulbs, most people are used to turning off a certain number of lights when leaving a room or going to bed.

For example, most people only use one overhead light in their bedroom and turn off all other lighting sources.

If this person were to switch from incandescent to LED bulbs, they might be more inclined to keep all lights on in their bedroom because they do not have a specific visual cue for turning off the light.

This is where there are some adverse effects of using these 3157Na lightbulbs rather than regular incandescent ones.

The most common area for these lightbulbs is in the bathroom, where many people like to read or finish the grooming before bed.

If the family were to switch from an incandescent bulb to an LED one, they might not see when doing these tasks at night.

This could lead them to keep other light sources on in their bedroom, leading to the increased cost of electricity.

However, we can conclude that LEDs are a better choice for your home because they save you money in the long run and are better for the environment.

FAQs about 1357A Vs 1357Na

– How does 1357A Vs 1357Na affect your eyesight?

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It’s true that 1357A Vs. 1357Na can affect eyesight, but if you’ve never noticed any difference, then you don’t need to worry.

It’s important to note that it can take three months or more for your eyesight to adjust if you change from incandescent lightbulbs to CFLs. 

Your eyes might also get used to the new light by themselves within a few weeks, but it’s up to you whether you want to wait this long or not.

– How much does a 1357A Vs. 1357Na cost?

The price of a typical 1357A Vs 1357Na bulb is about three or four dollars, but it ranges anywhere between five and fourteen dollars if you want a specific brand.

– Is there anything wrong with using an energy-efficient lightbulb indoors all day long?

It’s not dangerous to leave on an energy-efficient bulb all day. Decreasing the risk of cancer is the more compelling reason to keep your lights on for as long as possible, but there are other benefits too.

However, leaving them on too long leads to a build-up of heat which can be very dangerous.

– Which is better for my room, 1357A or 1357Na?

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Both 1357A and 1357Na bulbs produce the same light quality. They will both produce bright white light with a crisp, glare-free beam with an even spread of illumination. Indoor use only, not for outdoor street lights or home exterior illuminating lighting.

– Where is 1357A Vs. 1357Na lightbulbs used?

Both use the same household bulb base in standard sockets with medium screw-base E26/E27. This is not to confuse the larger Edison screw base (E39), which is not compatible.

– Why should I buy a 1357A lightbulb over a traditional 60-watt incandescent bulb?

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1357A has a longer life (10,000 life hours), complying with new Energy Star Standards.


Both types of bulbs can be cleaned easily by wiping them with a dry cloth.

Energy savings:

1357A saves more energy than the traditional light bulb because of its lower power consumption, which is now at about 10% (1.18 watts per hour) instead of the conventional 60 watts or 16%. 

This is up to 90 saving of the electricity cost per year if you use one bulb continuously for 12 hours each day.


The 1357A has greater lighting effectiveness than the traditional 60 watt, which ranges from 100-130 lumens and below, respectively, more prosperous and brighter colors that automatically adjusts to your surrounding.

Saves you money:

As mentioned above, 1357A’s power consumption is at 10%, which you can save up to 90 bucks in a year compared to traditional bulbs.

It also produces less heat which extends the lifespan of electrical appliances due to lower heat production such as TVs and stereos.

Life Span:

You will save more because the 1357A has 10,000 life hours equivalent to at least ten years of use if you use it for 12 hours each day.

Light spectrum:

1357A emits warm white light, which is very close to natural sunlight and ideal for home lighting.

If you are a first-time buyer, this video could be a great help to you:


So, which one should you buy? The 3157A or the 3157Na? If you’re interested in saving money on energy costs and helping the environment, go for an LED bulb.

However, there are still some negatives of switching from incandescent lightbulbs to LED ones. But, the first and most crucial benefit is saving money on energy costs in the long run.

This will make a significant difference in a family’s monthly budget and a person’s savings.

It’s more expensive up front, but over time it pays off because of its energy efficiency. Therefore, switching from incandescent lightbulbs to LEDs is a better choice for the environment and your wallet.

Now, we’ve come to the end of the article. Thank you for staying with us through the end of it. We hope that our article provides you with some valuable pieces of information.

Goodbye and see you in our next article!

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