The 7 Brightest and Best H4 Bulbs – 9003, HB2 Headlight Reviews

H4 bulbs have two filaments and these bulbs provide the appropriate illumination for the automobiles high beam headlights and the low beam headlights.

When people are searching for the right headlight bulbs to buy they often look for the brightest H4 Bulbs or 9003 headlights. This is understandable if your owner’s manual recommends either of these bulbs for your vehicle, but to tell the truth these two bulbs, (although they are numbered differently), are the same bulbs.

Our experts on vehicle lighting and accessories examined several different H4 and 9003 bulbs to create this list. If you are looking for H11 then Check this post: Reviews of the Best H11 Bulbs

H4 Bulbs Reviews 2021

BEAMTECH H4 LED Headlight Bulb – Brightest H4 Headlight Bulb

These BEAMTECH LED headlight bulbs are in the CSP Chips conversion kit that provides you with the high beam and low beam lights that you are used to having in one simple to install kit. You can stop relying on the candle dim bulbs you are currently using and start experiencing the bright white light of LED lights.

The beam pattern of LED lights is created perfectly so that the driver of the vehicle does not have blind spots or darkened areas where they cannot see clearly.

The 6500K color rating assures you that the light color is white, not yellow, and not blue. The light emitted by these bulbs is brilliant white/

You do not have to worry about the head light bulbs burning out and leaving you to drive with only one headlight or no headlights. These bulbs are proposed to last for 30,000 hours or about 17 years.

The kit installation is easy. You simply unplug the halogen bulb that is there and plug in the new LED bulb and you are finished in less than twenty minutes.

HIKARI LED H4 (9003) –  H4 Headlight Bulb

The Hikari LED headlight bulbs conversion kit is an adjustable beam conversion kit that allows you to set the beam direction of your lights via a simple to adjust the collar. Once you have situated the collar so that the beam of light is emitted exactly like you prefer it to be you will find that you have a flawless stream of white light pouring from your headlight assembly.

The light these bulbs emit is 220% brighter than the light of ordinary Halogen bulbs. The color temperature of these bulbs is higher so the light is whiter and brighter than any headlight light you have experienced.

These two headlight bulbs produce 9600 lumens.

These bulbs have a very long life expectancy because they are able to stay cooler.  They have a mini fan that keeps the heat from causing damages to the bulbs. They also have copper in their design in place of the customary aluminum so these lights have less heat build-up.

The kit is a DIY installation that is easy and will take you less than half an hour to finish. If you are owning a Jeep don’t forget to check this post: Fog Lights for Jeep Wrangler

Auxbeam F-S2 Series 2 Pcs of H4 LED Conversion Kits

Auxbeam is a renowned brand for headlight kits among car owners. This F-S2 series LED Headlight comes with 2 sets of H4 conversion kits having a plug and play installation methods. It has a high-speed mute fan built-in which helps to work at any temperature and the bulb remains cool and produces perfect light keeping the brightness. 

The best part of this bulb is the material used. International aircraft-grade 6063 aluminum is used to build this product.

So, undoubtedly, this is a super sturdy product for your headlight. Another feature that I should mention is the latest technology of high power COB chip ( made in the USA ) that are also used in this bulb. This will prevent dark spots or foggy light remaining the super brightness. Auxbeam F-S2 is a driver-friendly light that ensures maximum safety while you are driving as it has excellent lighting choices of the high and low beam. Clear beam with 360-degree revolving. So, there’s no blind zone during your drive. It is using xenon white light which will help you to show the road signs and paints clearer than any other bulbs you are tested. 

OSRAM Night Breaker Unlimited H4 (Twin Pack)

The Osram night breaker unlimited H4 is definitely a contender for being one of the top H4 lighting solutions. These bulbs come in a convenient two pack. It is recommended that you change both of your headlight bulbs at the same time so that both of your headlamps are producing equal light. By doing this you eliminate dark areas in your line of vision and you increase the distance that the bulbs are capable of projecting the light they are producing.

You will find that these bulbs burn 110% brighter than the halogen bulbs you are used to using. 

You will not only have more light, your light will be brighter so you can see farther and react faster to possible problems.

The light that these bulbs produce is not only brighter than what you are used to getting from your halogen bulbs it is whiter than what you are used to seeing. Whiter light is caused by a higher color number. Whiter light makes you see things more clearly and thus it keeps you safer.

NINEO H4 LED – Best 9003 Bulb

The Nineo H4 9003 LED headlight bulbs have CREE chips in them. The CREE chips are enhanced by the materials that are used to create them. The manufacturer uses the best materials and produces LED chips that are exceptionally thin, they have low forward voltage, they generate the lowest amount of heat possible, they have long lifespans and they have exceptionally high ESD tolerance and resistance.

By installing this kit you will bring your vehicle lighting out of the dark-ages and into the bright future.

These lights have a color rating of 6500 and they produce 6000 lumens. So you know they are bright and have a powerful white light. They also have a perfect beam pattern, and they are five times brighter than the ordinary halogen lights are.

They are very thin and they have a 360 degree mounting collar that allows you to direct the beam to your precise requirements so you get the most light with no dark areas. The light distribution is performed through a wider angle lens so you can see everything before you and the things that are to the sides of the road as well.

LASFIT 9003 – Brightest H4 LED Bulb

If you want the simplest lights to install then you should consider these Lasfit LED headlight bulbs with plug and play technology. You do not have to cut any wires or splice together any wires. No electrical tape or wire nuts are required. This bulb has a built in driver ballast so you replace the stock halogen light you have by pulling it out of the socket and then plug this LED version into the socket. It is really that simple.

When you select this plug and play light kit you will reap benefits like:

  • 5600 lumens ( each bulb produces 2,800 lumens) that means crystal white light is emitted from these bulbs
  • The standard hi beam and low beam operations
  • A 7,000 RPM turbo fan that will keep the lights cool and provide you with an expected 50,000 hours of light
  • Less possibility of glare for oncoming traffic
  • Instant illumination when the switch is turned on

These bulbs will fit in 90% of the vehicles that require an H4 bulb. 

Cougar Motor Conversion Kit –  H4 LED Bulb

One of the biggest enemies to automobile headlight bulbs is the heat produced by the bulbs when they are in operation. These Cougar Motor H4 LED headlight bulbs have a 7,000 RPM fan that creates a cooling affect so the heat will not kill your lights abilities.

These light bulbs create a beautiful white light. They have a 6000K rating and they produce 7,200 lumens per pair. In laymen’s terms, that means the light they emit is brilliant white, not yellow, and not dim or dingy.

These lights have a life expectancy of more than 50,000 hours operating time. You can figure that these bulbs will likely be operating in your automobile 17 years after you install them.

This kit has an adjustable mounting collar so you can direct the beam properly. You will not have headlights that shine too high above the roadway or too low. Your projected beam will be farther than the beam of ordinary halogen bulbs, and your family will ride safer because you will be able to see better. 2 more headlight review post you might be interested: How to Pick the Right 194 LED Bulbs and 5 Best and Brightest 9005 Bulbs

Best H4 Bulbs – Things to Be Considered

Color Temperatures

The color temperature of a light is measured in Kelvins. This temperature designates whether the light produced by the bulb is a bright white, warm white, or cool white.

  • Warm white is produced at 2000 kelvins to 3000 kelvins. This light has a yellow hue and it does not project very far in front of your vehicle.
  • Cool white light is emitted from 3100 kelvins to 4500 kelvins. This light is bright and vibrant.
  • Daylight or bright white light is produced at 4600 kelvins to 6500 kelvins. This light may have a slightly blue hue to it, but it closely resembles the natural light you expect at midday.

The Lumens

When you are buying automobile light bulbs you can often buy them as pairs. If you buy the pair of bulbs at the same time then they will produce the same effective light on each side and need replacing at about the same time. This allows you to avoid driving around with one headlight bulb burned out. When a manufacturer prints the lumens that the light bulbs can produce on the package they can be referring to the lumens each individual bulb can produce or the lumens that are produced by the two bubs working together. Make sure you know the lumen capabilities of each bulb before buying.


Look at the type of bulb you are buying. A halogen, an HID, and an LED are the main three considerations in automotive lighting. The Halogen bulb should be cheaper and should last the shortest amount of time. The LED and the HID are equal in the intensity of the light, but the life expectancy of an LED far exceeds the life expectancy of an HID.


The cost of the bulb will be directly related to the life expectancy of the bulb. Make sure the higher cost bulb has a longer life expectancy before you buy.

We reviewed some other headlights in our website. here you go: Brightest HB5 Headlight Review and H7 Bulbs List


Is an H4 bulb the same as 9003?

The big difference between the H4 and the 9003 is the vehicles they are designed to be used in. The H4 is primarily used in motorcycle headlamps and the 9003 is primarily used in automobile headlamps. The bulbs are alike in size, shape, and even in most connections, but the light they emit is regulated for specific uses in motorcycles or automobiles.

How to remove H4 headlight bulbs?

  • To begin removing the H4 headlight bulb you need to find the electrical connection at the back of the headlamp bulb.
  •  Once you find the connection you will need to pinch it to make it possible to remove the bulb
  • There is a rubber cover on the bulb that serves to protect it. This cover should be removed.
  • The wire that keeps the bulb in position will be held in position on one side by a screw
  • On the side that does not have a screw, you can press the wire inwards and upwards to make it pivot away from the headlamp bulb so the bulb can be easily pulled free

What is H4 bulb retaining clip?

The retaining clip is a small piece of either plastic or wire positioned beside the wire that holds the headlamp bulb into position. The retaining clip allows the bulb to be pivoted but remain attached securely.


The H4 LED lights to provide brilliance, clarity, flawless beams, and a host of other great benefits. These headlight bulbs are specially crafted so they do not build up the same heat as traditional bulbs build up. This heat dissipation technology is helping to create headlight bulbs that last longer than many of the cars last.

Making the conversion from typical halogen bulbs to the LED technology will save you money, save you grief, save you from driving fatigue caused by eyestrain, and save you from accidents.

We will be happy to hear your thoughts

Leave a reply

RUF - Car Chargers & Others