7440 Bulb Vs 7443 – Which is the greatest option for your vehicle?

Are you looking to replace your 7440-light bulb with a 7443? If so, you’re in for a bit of a surprise. There are actually quite a few differences between the two bulbs, and understanding them will help make your decision easier.

In this article, we’ll explore the key differences between the 7440 and 7443 light bulbs, and help you choose the best bulb for your needs.

Before that, take a look at the statistics of Headlight Study Results,

Good Headlights Reduce Crashes by 19%, Says IIHS Study

Headlight Study Results

The research looked at 44,000 single-vehicle collisions that occurred at night. All 187 of the cars under investigation had headlight systems with an IIHS rating.

Good headlights decreased collisions by 19% compared to cars with bad ratings, even after adjusting for variables unrelated to visibility. Vehicles with adequate or mediocre headlights lowered accident rates by 15% and 10%, respectively.

For collisions involving injured drivers and pedestrians, the effects are much more obvious. When compared to poor-rated lighting, good-rated headlights reduced accidents resulting in driver injury by 29% and pedestrian collisions by 23%. Source

What Is the Difference Between 7440 And 7443 Bulb?

7440 Bulb Vs 7443

The main difference between the 7440 and 7443 bulbs is that the 7443 contains more light. The most obvious way to see this is in terms of brightness; a 7440 bulb emits 10 lumens per watt, while a 7443bulb emits 12 lumens per watt.

7440 Bulbs7443 Bulbs
Single FilamentDual Filament
Used in turn signal lights on the backMostly located in the front

7440 Bulb Fits What Cars: What Does A 7440 Bulb Fit

7440 Bulb Fits What Cars

A 7440 bulb fits many different Toyota, Volkswagen, Scion, and Chevrolet cars. It may not fit all of these models specifically because each car has a specific type and size of light Bulb.

If you’re not sure which light Bulb your car needs (or if you just want to buy the cheapest option), then you can use our universal car light compatible guide to find the right one for your vehicle.

7440 Bulb Wattage

7440 Bulb Wattage

A 7440 bulb is typically a 25-watt light Bulb. However, there are sometimes other watt versions of the bulb available.

Because higher wattage light Bulbs last longer and produce more light, they’re typically worth buying if you need an upgrade for your existing lighting.

7440 Bulb Cross Reference

7440 Bulb Cross Reference

The 7440 bulb refers to a type of light bulb that looks like the T20 and 7740 bulbs. The difference between the three is that they all use the same base, or what holds the bulb into the socket of your vehicle. The 7440 is a 25-watt light Bulb, the 7443 is a 25-watt bulb, and the T20 is a 20-watt light Bulb. 

Both types use the same sides of a standard A11 base bulb, although there are some optional lights that can change slightly to accommodate different sizes.

The 7440 and 7443 bulbs look almost identical as they’re both clear glass bulbs, this is usually done when an auto manufacturer uses different shaped coves in their headlamps.

What Is A 7440 Bulb Used For

What Is A 7440 Bulb Used For

Opting for the 7440 bulbs is a popular option when replacing your turn signal, taillight and and other vehicle lighting.

They are found in cars such as Toyotas, Scions, Hondas, Chevrolets, Volkswagens, and others. These are typically used as back up lights and turn signals.

The use of the 7440 is due to its lower wattage, which means it will last longer and produce less heat. It also has a more consistent light output than some other options.

7440 Bulb Dimensions

This bulb’s light center length is 25.4 mm or 1 inch. The Sylvania 7440 Bulb, replacement light has a bulb diameter of 20.6 mm or 0.81 inches.

The Sylvania Automotive 7440 replacement bulb has a maximum overall length of 48.3 mm (1.9 inches).

The Sylvania 7440 Auto Bulb will fit in most automotive applications requiring a smaller size 20mm bulb and uses approximately 25 watts at 12 volts when properly installed in your vehicle’s light fixture.” 

The Sylvania 7440 Automotive Bulb is a halogen automotive bulb that can withstand a higher temperature than most bulbs.

The 360-degree beam angle provides a wide pattern of light while the non-polar design allows the bulb to work with most automobile tail lamps.

7440 Bulb Led Replacement

For brighter light, the Sylvania 7440 Automotive Replacement Bulb is available in LED. The 7440 bulbs can be converted to an LED by replacing the traditional clear glass with a high-power LED.

This gives you a very bright and long-lasting light that won’t require as much attention from you or your car’s battery as an electrical switchback might. 

The Lasfit CANBUS Anti Hyper Flash LED Turn Signal Light is a simple plug-and-play solution for your car.

Upon paired with a CANBUS-capable car, the light will show a stable on position and appropriately flash when receiving this signal from your vehicle.

Osram Sylvania 7440 Miniature Bulb

Osram Sylvania 7440 Miniature Bulb

This SYLVANIA Ultra Miniature bulb is ideal for use in the house or automobile. The SYLVANIA 7440 is a 2 3/8″ length, 1 5/8″ diameter bulb with two strong LEDs.

This variant may be utilized in a variety of settings, including a glove box or trunk. The Sylvania 7440 is also ideal for use in a light bar or wherever heat accumulation is undesirable. 

Each bulb has a life expectancy of 10,000 hours or more, making it less likely to burn out when utilized at maximum power.

The filament of the Osram Sylvania 7440 Miniature Bulb is intended to survive longer than the filament in your present bulb.

The filament coating delivers up to 50% more life than normal CFLs while utilizing one-fourth of the energy. 

This frosted bulb will fit most compact fluorescent fixtures, allowing you to get the advantages of compact fluorescent lighting without having to replace any fixtures in your house.

7440 Bulb Socket: 7440 Bulb Socket Dorman

7440 Bulb Socket

The Dorman 645-933 rear light socket is composed of high-quality materials that will last for years. This socket has a single contact and can provide 12 volts, 60 watts, and 2.5 amps.

This is an automotive quality, OEM replacement component that is compatible with a wide range of automobiles, including GMC, Ford, Dodge, Jeep, and others. 

This Dorman 645-933 socket is used in GM automobiles for parking lights, backup lights, and side marker lights.

This Dorman rear light socket is intended to replace a broken or damaged original component and give years of trouble-free operation.

It is repairable and simple to install using existing hardware & wire leads. This is a direct equivalent replacement bulb socket that installs or replaces the current one fast and effortlessly.

7440 Socket Pigtail

7440 Socket Pigtail

This item is a pigtail harness that includes an iJDMTOY wire harness with 7441, 7440, and 7210 sockets.

A high-quality wire harness for your 7440 sockets. The product is composed of high-quality materials to provide long-lasting performance and trouble-free usage. 

Its small form makes it ideal for usage in a variety of vehicles. By connecting another socket to the end of the line, these pigtails give a simple plug-and-play option for adding a socket to your OBDII port.

Solid ABS plastic construction with a high-duty ABS jack that has been molded for strength and longevity.

What Cars Use 7440 Bulbs

What Cars Use 7440 Bulbs

7440 bulbs are high-quality and durable replacement bulbs. These high-power halogen bulbs are made for high-performance vehicles, such as sedans and trucks.

You can find 7440 bulbs in cars such as Toyotas, Scions, Hondas, Chevrolets, Volkswagens, and others.

Are 7440 And 7443 Bulbs the Same?

These bulbs are not the same. The 7440 is only one filament, while the 7443 has two filaments.

The 7440 is used in rear turn signals, sedans, and taillights, while the 7443 is used for front parking/turn signal indicators.

What Size Is A 7440 Bulb?

What Size Is A 7440 Bulb?

A 7440 bulb is a standard-sized, high-power halogen bulb.  The 7440 Bulb, replacement light has a bulb diameter of 20.6 mm or 0.81 inches. The 7440-replacement bulb has a maximum overall length of 48.3 mm (1.9 inches).

Will A 3157 Bulb Fit A 7440?

A 3157 bulb is used in tail lights while a 7440 bulb is used in turn signals. A 3157 bulb will not fit into a 7440 housing because the base of each bulb is shaped differently and there is no adapter or bulb socket that will allow the two bulbs to fit together.

The 3157 bulb is not a direct replacement for the 7440. A 3157 bulb will fit in the socket and will light, but it does not provide power to operate all of the functions as a 7440 light bulb does.

Can I Use 7440 Instead 7444?

Can I Use 7440 Instead 7444?

No, the 7440 and 7444 bulbs are not interchangeable. Both the 7440 and 7444 do not have the same voltage rating, they have differences in their operating temperature ranges, their power handling capabilities, and their surge current ratings. Therefore, parts should only be substituted if they have identical specifications.

What Is the Difference Between 7440 And 7440A?

The only distinction between 7440 and 7440A bulbs is their color. The bulb in the 7440 is clear glass, whereas the bulb in the 7440A is amber.

They are both 25W. The 7440 is a clear glass bulb suitable for ornamental installations and track lighting. 

The 7440A is an amber glass bulb that decreases glare while being visible in the ornamental fixture or track light.

We suggest the 7440 if you desire a clear glass bulb. The 7440A is an amber glass bulb that we suggest.

Will A 921 Bulb Fit A 7440?

Will A 921 Bulb Fit A 7440?

This is a common question that many homeowners ask, and the answer is unfortunately not affirmative.

The 7440 is a newer model, and the bulbs it uses are typically a different shape (and size) than those used in older models.

If you’re not sure whether or not a 921 bulb will fit your light fixture, it’s best to contact a lighting specialist to get an accurate estimate.

How Many Lumens Is A 7440 Bulb?

The 7440 has a light output of 25 watts. This means that it produces about 465 lumens.

7440 & 7443 Brake Light Bulb Replacements

7440 & 7443 Brake Light Bulb Replacements

NOVSIGHT offers replacement brake light bulbs to replace your broken or burned-out bulb. This is a set of two high-quality LEDs that will glow when you press the brake pedal.

NOV Sight, one of the world’s largest professional light manufacturers, created this device. It is backed by a lifetime warranty against faults. 

The NOVSPEED 7443 & 7440 brake light bulb replacements are the brightest regular retail replacement bulbs available.

Professionals built these small lights to satisfy their specific brightness and distance needs. They are perfect for business parking and fleet cars when huge bulbs are either impracticable or hinder the driver’s field of view.

SEALIGHT’s 7443 LED bulb is engineered to run in reverse, making it directly compatible with many cars’ original equipment low beam setting.

This one-of-a-kind design allows for a simple and direct replacement of your old halogen or current bulb-type LED headlight bulbs. This LED headlamp is made to endure with a sturdy aluminum body and a glass lens. 

About 7443 Led Bulb

About 7443 Led Bulb

With a tremendous brightness of 3000 Lumens, it can light dark roads ahead of you, allowing you to drive securely at night or in inclement weather.

The SEALIGHT 7443 LED Bulb is an excellent automobile light. This bulb has a lifespan of up to 25,000 hours and may be used to replace headlights, fog lights, parking lights, tail lights, turn signals, and other lighting fixtures.

What Type of Bulb Is 7443?

The type of bulb that is listed as 7443 is a dual filament. This means that it has two filaments, or electrodes, that produce light when electricity passes through them.

These bulbs typically have a longer lifetime and are more efficient than traditional incandescent bulbs.

What Is A 7443 Bulb Used For?

What Is A 7443 Bulb Used For?

A 7443 bulb is a backup reverse light used in car garages and other applications where there may be low or no daylight.

When darkness falls, this bulb shines directly down on the ground to provide visibility while reversing.

7443 Bulb

7443 Bulb

The SYLVANIA 7443 Miniature Bulbs, Pack of 2 are intended to suit a range of exit signs and emergency light fittings.

The best quality filament materials, gas fills, thermal stress-tested filaments, and durable molded bases are used to achieve the 2000 Hour (5 Year) average bulb life. 

For optimum light output, these bulbs are OSHA certified and satisfy NEMA FL 1-2008 performance criteria.

This tiny bayonet-shaped bulb is put into most car sockets by slipping the bulb on from one end and twisting 90 degrees to secure it into place. Sylvania 7443 small bulbs are not reusable and are only intended for one-time usage.

Are 7443 And 3157 Bulbs Interchangeable?

No, 7443 bulbs are not interchangeable with 3157 bulbs. The 7443 bulbs should not be used in 3157 sockets.

7443 Bulb Wattage

The wattage for a 7443 bulb is 25 watts.

7443 Bulb Led Equivalent

7443 Bulb Led Equivalent

The Sealight 7443 Premium LED Bulb replaces the standard 7440 bulbs. Sealight 7443 led bulbs are up to 80% more efficient than normal incandescent lights (up to 130 watts).

The Sealight 7443 led bulb features a brightness of 3000 Lumens, a lifetime of 25,000 hours, and an 11-year Bulb Guarantee.

This sealed beam headlight emits a bright 3000 LUMENS of white light, providing you with a clear vision of the road and increasing your nighttime safety.

7443 Bulb Brake Light

7443 Bulb Brake Light

Sylvania 7443 Halogen Auto Mini Bulbs employ Sylvania’s unique Halogen filament bulb to make driving at night safer.

Each bulb has a specific quartz and halide salt coating that enables the lights to burn brighter and provide more light than ordinary micro bulbs. These Sylvania bulbs are simple to install and will not dim or flicker for many years.

7443 Bulb for What Cars

The 7443 bulbs are most commonly found in Toyotas, Scions, Hondas, Chevrolets, Volkswagens and others.

7443 Bulb Cross Reference

7443 Bulb Cross Reference

This is a list of bulb cross references for the most common bulb types. The first number represents the shape of the bulb and the second two numbers represent its dimensions in inches or millimeters. 

7443 bulb cross reference is for 7443LL, 7443ST, 7444NA. The two most common bulb types used in projector lamps for projectors are UHP bulbs and HID bulbs, which can be found at numerous online retailers.

7443 Bulb Socket

The TOMALL 7443 T20 Bulb Socket comes with an 18 mm thread and is designed to fit brake lamps on almost all cars, trucks, and other vehicles.

It has a female adapter on it, which can be used to connect the socket to brake lamps. The socket has been made using maximum tested plastic material that ensures long-lasting performance and durability.

This product offers wide compatibility with most brake lamps including those of Honda Activa GY6 125cc scooter, Yamaha YBR 125MB, Honda Dio DAT Two-wheeler, and Victory motorcycles.

What Socket Fits A 7443 Bulb?

What Socket Fits A 7443 Bulb?

The 7440 bulb socket fits a 7443 bulb. A 7440 is a type of base used to hold a 7443 bulb. The 7440 bulb socket has a three-prong connector that fits into the socket on the light fixture.

It is best to use a standard small screwdriver to tighten down the connection of the bulb once it is in place.

7443 Bulb Socket Dorman

7443 Bulb Socket Dorman

The Dorman 7443 replacement brake light socket is intended to be as good as or better than the original equipment (OE) item.

When changing a bulb, it is also necessary to change the socket. This ensures that the bulb is correctly seated and that an unimpeded flow of power is available to illuminate your path. When you need a new brake light socket, you can rely on Dorman products. 

This socket has an enhanced metal structure for longer service life and corrosion resistance, as well as a vibration-resistant metal body.

Installing this brake light socket ensures that your vehicle’s lighting system is running at peak efficiency, guaranteeing safe visibility.

Tomall 7443 Bulb Socket

Tomall 7443 Bulb Socket

The TOMALL 7443 snap connection socket is ideal for connecting several manufacturers’ incandescent, halogen, and fluorescent lights.

It is compatible with new or existing fittings and connects directly to the vehicle brake line. The TOMALL 7443 Bulb Socket is intended to replace the missing female adaptor on ordinary light bulbs, but it may also be used to connect accessories such as brush lights, fog lights, and automobile speakers. 

This socket is intended for use with a standard light bulb for your brake lights or turn signals. The oval-shaped housing is composed of high-quality brass. The product is covered by a one-year guarantee and a 30-day return policy.

How Does A 7443 Bulb Work?

How Does A 7443 Bulb Work?

The 7443 is a replacement bulb for many vehicles. It is a two-contact bulb, which means that it has two distinct circuits inside the bulb.

One for high beams, and one for low beams. Four different wires protrude from the bottom of this bulb.

The first pair of wires are your bright/high beam connection, while the other pair is your running/parking lights connection.

7443 Socket Wiring Diagram

7443 Socket Wiring Diagram

The 7443-socket wiring diagram is provided to help you connect your electrical appliances. The connections have been laid out as simply as possible to ensure that you don’t get confused while connecting the leads.

Also Read:

  1. 2057 vs 1157 Bulb
  2. 7506 Vs 1156 Bulb


Are you looking to buy a new light bulb, but aren’t sure which kind to buy? You’re not alone! There are a lot of different types of light bulbs out there, and it can be hard to decide which one is right for you.

In this article, we have compared the 7440 bulb vs 7443. We have looked at their specifications, compare their benefits and drawbacks, and given you a verdict on which one is better for you.

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