Miniature LED Bulb FAQ

What does the miniature bulb refer to?

For auto led lights bulbs, miniature bulbs usually refer to the interior lights,license plate light,side marker light,or parking light.

The bulb size base includes T10, T15,  T5, BA9S, festoon D31(31MM), D36(36MM), D42(42MM),etc.Back to Top

What is a T10 or T15 wedge bulb?

T10 bulb stands for the 10mm width on the top of the bulb, nothing with the socket; T15 bulb stands for 15mm width on the top of the bulb:

T10 Base              T15 Base

A T10 bulb is compatible with  the original standard bulb size: W5W 147 152 158 159 161 168 184 192 193 194 259 280 285 447 464 501 555 558 585 655 656 657 1250 1251 1252 2450 2652 2921 2825 PC 175 2886X;

T15 bulb is compatible with the original standard bulb size 579 901 904 908 909 912 914 915 916 917 918 920 921 922 923 926 927 928 939. Back to Top

What is a 31mm/36mm/42mm bulb?

These bulbs are usually called “festoon” type bulbs with metal points a the end of the bulb. They are commonly used for replacing interior map dome lights,courtesy light,trunk light, or license plate lights.

31mm bulbs are compatible with the original standard bulb size  DE3175, DE3022, DE3021, 3021, 3022, 3175, 6428, 6430,etc.


36mm bulbs are compatible with the original standard bulb size 6418, 6411, C5W, DE3425, DE3423, 3423, 3425, 6461, 6423, 6486X, 7456, etc


42mm bulbs are compatible with the original standard bulb size a 578, 211-2, 212-2,214-2, 579, 6413, 6429, 4410, etc. Back to Top


What color is legal for my vehicle?

For interior lights, there us no restrictions about the color requirement, i.e, you can upgrade the interior lights any colors. Yet for exterior lights, it is recommended to check with your local laws. Here we  listed some common legally colors:

For the front of the vehicle: white,amber & yellow color are allowed

For the rear of the vehicle, white for license plate light,amber yellow and red for side marker light or center high mount stop light,etc.  Back to Top

What is the difference between polarity & non-polarity?

Many led bulbs in the market are polar sensitive, it requires the led bulbs positive must connect with 12V power positive or it will not light up.

So for the polarity bulbs, if the bulb doesn’t light up, please flip the bulb 180° degrees and try to install again.

Yet for the non-polarity bulbs, you will not worry about this polarity issue. no matter how you connect the bulb into the original socket, it will light up.

Most of our miniature bulbs are non-polarity bulbs for we have made a great improvement to make it more easier to install for the customers. Back to Top

How to tell which bulb is the brightest and best?

Usually for led bulb brightness, it is calculated by the light output lumens, the lumens is higher, the bulb bulb is brighter.

Yet please note, when you care of the lumens, also please care of the heat dissipation, for many led bulbs are bright in the market, but easily burned out,because the heat dissipation is bad.

Our miniature bulbs are built in IC driver to control the stable current, and built in better heat dissipation,which will makes the bulbs’ life span much longer.Back to Top

>What is a led bulb’s life span?

Logically, if the led bulbs works in perfect condition, it will last up to 50,000 hours, yet due to different factors , such as heat, voltage, weather, vehicle usage, or other factors, will shorten the led bulb’s life span. But usually the led bulbs will work about 20,000 hours in average.      Back to Top

LED Brake Light FAQ

What color should I use for brake lights?

The color for brake lights should be RED LEDs, white is acceptable if you don’t mind the pinkish hue to the lens and the lens is red lens. If it is white lens, only red is acceptable.

Do I need resistors for brake lights?
This will depend on the vehicle, if it throws a code on your dash or flickers then you would definitely need resistors to fix those issues

.Can I change the LEDs in my brake lights if they are already LED?

No, LED brake lights from factory will not be changeable like regular bulbs, however there are companies out there who do custom tail light work to make brake lights brighter or other custom jobs.

I changed my brake light bulbs to LED and they are not brighter?
This happens on different vehicles, when this happens, please contact us by clicking here, we will recommend the brighter bulbs for your own safety.

My Brake light fuse keeps popping?
Probably the socket type doesn’t match. There are 2 types of the socket, CK type and standard type. Please click here to check the difference. The standard type bulbs will pop out the fuse if plug into the CK type socket, it requires to purchase CK compatible led bulbs.


CAN Bus LED bulbs are simple plug-and- play LED bulbs which are made specifically for CAN Bus-equipped vehicles. These bulbs work with your vehicle’s advanced computer system, so when your vehicle’s computer reads them, they respond back correctly.

What does CAN Bus mean?

CAN Bus means Controller Area Network Bus. This system monitors your vehicle and reports operating conditions. CAN Bus systems are commonly found in European vehicles such as BMW, Audi, Mercedes, Volkswagen, Porsche, and in many American vehicles. While most late model American vehicles have CAN Bus systems, it is always good to check with your vehicle dealer to see which system your vehicle has before purchasing electrical products.

Will CAN Bus LED Bulbs Prevent “Bulb-Out” Indication?

Each vehicle has different requirements that the CAN Bus system is looking for, but in most cases CAN Bus LED bulbs should prevent a “bulb out” indication in areas such as tail, brake, and running lights. If you use a standard LED bulb that is not a CAN Bus application, you would consistently get a “bulb out” dashboard indicator because your system can’t communicate with a standard LED bulb.

Will CAN Bus LED Bulbs Prevent Hyper-Flashing?

CAN Bus bulbs will not prevent hyper-flashing of turn signals. These bulbs are communicating with the CAN Bus system, but the relay still needs an appropriate amount of load to operate correctly. Your electrical system could require load resistors or an electronic flashing relay to stop hyper-flashing. The factory relay causes the hyper-flash when it thinks there is not a bulb working.

Can you use CAN Bus LED bulbs in non-CAN Bus applications?

Yes, the can-bus led bulb can be used as non-Can Bus application.


What is a CK/SRCK socket?

A CK/SRCK is like the traditional sockets you see in most Japanese, and American vehicles except the ground terminals are located on the same side of the socket.  If the ground terminals are located on the opposite side of the socket, then it more then likely is a standard socket.  We still encourage you to test the sockets using a multimeter.  To identify the ground positions.

Standard type                        CK Type.jpg

Standard Socket

What will happen if a standard LED bulb is used for a CK socket?

Only one level of brightness(intensity) will light up, and when the other application is activated, it will cause a short on the circuit.

How to distinguish between a  CK socket and a standard socket?

From our experiences, most TOYOTA vehicles front turn signal sockets are a CK type.  Sometimes, you can even see there are two terminals connected directly, which means they are the ground terminals.  You may also identify the ground terminal location from the wires on the back of the socket.  A test is still required, using a multimeter, in order to confirm the type. Also your original bulb will tell you if it is a CK or standard, most CK bulbs will say SRCK on the bulb base.

Why do I have a standard halogen bulb, but a CK socket?

The ground pins of halogen bulbs are not shared. The ground pins of LED bulbs are connected on the circuit board inside the LED bulb. The circuit board is necessary to help maintain the temperature of LED which will provide stability, and a long lifespan.

How to solve Turn Signal Light Hyper-Flash

Did you just purchase LED bulbs for your turn signals, installed them and now is wondering why it is flashing really fast?

Well the reason is LED lights draw about 5W of power, which is much less than that of a halogen bulb(27W~30W).  An error code or hyper-flashing is a malfunction that will come up to notify the driver when vehicle detects a change in the power draw.  The vehicle is recognizing the upgraded LED bulb as a faulty (burned) halogen bulb due to the low power consumption

Below are the solutions we recommend that will fix any error code, hyper flashing, flickering issues that you may run into.

SOLUTION ONE: Plug n Play Resistors

3157-5 installation


We have made plug n play resistors for different socket types, ex. 7440 7443 3157 3156 etc. These plug n play resistors are very convenient due to the fact that there is not splicing or tapping of any of your OEM wiring. This will be the simplest solution to solve your hyper flashing issue.

PLEASE NOTE: Resistors will get hot, when installing resistors please keep them away from any plastic or wires.

The power of load resistors is 24W@12V  24W+5W=29W, nearly the same power as a halogen bulb




This LED flasher relay will replace your original flasher relay. Here at JDM ASTAR we have made this product for customer who do not want any resistors near any wiring or plastic, so this would be the best alternative for those customers. With this relay it is a direct replacement for certain vehicle makes such as Honda, Volkswagen, BMW, Mercedes-Benz, AUDI, etc.

The LED flasher relay is very similar to the resistor, it regulates the power and tricks the vehicles system to prevent the hyper flashing with the LED bulbs.



SOLUTION THREE: Universal Load Resistors

50W 6ohm load resistor

These Universal 50w 6ohm resistors will work for any vehicle to fix error codes and hyper flashing. With the universal resistors tapping or splicing is required. To install these resistors you would need wire taps. Most people will tap the rear turn signal wires instead of the front due to weather conditions or road conditions that may affect the resistors.

The universal resistors will help prevent any flickering issues, hyper flashing, or error codes by regulating the power draw to the circuit. These will work with any vehicle that may need it, installing these may be a tad bit difficult on some vehicles depending on how much space they may have.

To install these resistors you would need to tap the ground wire and the turn signal wire, for some vehicle this would be really simple to find since the rear turn signal has 2 wires. For the vehicles that have more than 2 wires in the rear turn signal you would need to use a test light and test which wire is the turn signal wire. After finding the wires and tapping them, you would need to mount these resistors away from any plastic or wires due to the resistors getting extremely hot and may cause damage to the vehicle.


To purchase any of these resistors please visit our website

3030 Series coming to a turn signal near you. . . .

Have you ever purchased a set of LED bulbs to upgrade any application in your vehicle?  You went for the biggest, ‘baddest’, and brightest LED light available and got amazing results, but you also only got a few days of life out of it.  Either your bulb is dimming, flickering, or some diodes are not lighting properly.  Whatever the case, the issue could have been due lack of proper heat dissipation since LED is prone to failure at high temperatures.  Look no further because JDM ASTAR just released a new product that not only offers performance results, but endurance!

Our latest addition to our LED lineup is our 3030 series.  Our 3030 series is capable of producing up to 1500 raw lumens per lamp at a color temperature for 6,000 kelvin for a highly visible, xenon white look.  They are also available in other colors like amber, and even a switchback version for the car enthusiasts!  It features a glass lens projector to help concentrate light towards the lens of the housing assembly.  This will, not only improve your driving experience, and safety, but will also give your vehicle the elegance it deserves.

The body of the bulb is made with an aircraft grade aluminum and has been redesigned to increase rate of heat dissipation.  The 3030 light emitting diodes are mounted on to an aluminum board, which is connected directly to the body of the bulb.  This will push the rate of dissipation even further by up to fifteen percent!  The built-in IC ‘constant-current’ driver also plays a role in maintaining temperature since it regulates wattage to each diode and ensures the proper amount power for high efficiency and stability. This will allow your bulb to run cooler for longer periods of time, without a worry of causing any heat stress to the diodes.  This will, in turn, provide a longer life span than a standard LED bulb without a cooling method.


The unparalleled design on our 3030 model also makes this LED bulb suitable for turn signal sockets that have a different configuration.  The non-polarity feature allows this bulb to function properly with sockets that have a CK/SRCK or standard configuration.  You will be able to upgrade your turn signal application without a worry of blowing fuse, or the hassle of testing the sockets, with a multimeter, that you probably do not have.

With how the 3030 series is designed, it makes this LED bulb suitable for a variety of lighting applications.  They are available in different bulb sizes ( 3157,4157NA,7443, 7444NA,1157,7528,etc.),  color, and are designed to replace stock halogen bulbs(20W-27W) for your fog lights, turn signals, back-up lights, brake and tail lights, daytime running lights and even parking lights.  Visit Here for more information on our 3030 series, and remember, time is money!  Invest your time properly and save money on a set that will provide longevity and performance.  Think endurance, think brilliance, think 3030. . . .coming to a turn signal near you!

LED bulbs not lighting up?

We have all been there, we purchase bulbs from online sellers, and once we get them in we are full of joy and excitement and ready to install. Some of us have installed some bulbs and find out that they don’t turn on, so we start assuming that they are defective and start having a huge disappointment. Now before you go and complain to the seller or give negative feedbacks, here are a couple of ways to troubleshoot your “defective” bulb.


STEP ONE: Rotate the bulb 180 degrees.

This step is the simplest way to figure out if your bulb is defective or not. You simply just rotate the bulb 180 degrees to see if the bulb will light up.

Now you may ask why it is necessary to do this, well most LED bulbs are polarity sensitive, which means they will only work when the positive pin matches up with the positive side of the socket/plug you are putting the bulb into.



STEP TWO: Bending the pins

This step is also an easy way to figure out if your bulb is defective. Bending or moving the pins more outward will help ensure proper connection with the socket. Sometime the bulbs base will be too narrow to the point where it will not make any contact at all, with a little modification with the pins on the bulb, you will have a nice snug fit and good contact to ensure that the bulb works perfectly fine.

T10 5050 wire adjustment

STEP THREE: Put back your original bulbs

If both steps did not work out for you, then you will move on to this step. It is another simple solution, put back your original bulb in the socket to see if it lights up. If the original bulbs light up then you can come to the conclusion that you have received a defective bulb, if the original bulbs do not light up then you would need to check your fuses or check the wires to see if there is any power going through the wire. Checking your fuses will be explained in the next step.

STEP FOUR: Checking Fuses

Checking fuses is always a solution to a lot of wiring or power issues that you may have. When the first three steps are not helping, this option would be sure to help you figure out why your bulb is not lighting up.

There are multiple fuses for almost everything in your vehicle, if your bulb is not lighting up this may be the reason why, you may have a blown fuse. To check which fuse you would need to pull or check, you would need to go to your owner’s manual and find the fuse box locations. Once you have found the location of the fuse box, this is where you can see which fuse controls what. Then once you have found the fuse that you are looking for, pull it and then you will be able to see if it is blown or not. If it is blown, replace it with the same amp fuse(NEVER use a high amp fuse) and test the bulb again.

How can I find the correct bulb size for my vehicles?

Have you have had a moment where you are driving down a roadway, and drivers keep flashing there lights, or honking there horn to alert you?  Your headlights are on, but there is no “lamp out” indicator so you assume everything is okay, but then you pull off to the side of the road, and you realize one of your headlights is out.  Now you have to contact your local dealer, or auto parts store, and speak to somebody, get placed on hold and listen to the, “oh so lovely”, music that you hear in an elevator.  What ever the case is, you just do not have time to go through steps to get the information you need to replace your lamp.

Our JDMASTAR.COM website features a user friendly guide(pls check the below button) which allows you to identify what part your vehicle requires for the main lighting applications.  You do not have to pick up a phone, or listen to any lovely elevator music.  Simply input your vehicle information like the year, the maker of your vehicle, model, and type or trim.  Upon doing so, our tool will generate the information you are looking for so that you know what size to buy.  The tool will list the bulb sizes for almost all lighting applications in your vehicle.  The tool will guide you to make sure you are buying the correct bulb size for your vehicles application.  After retrieving the information, pop out the traditional owners manual and confirm it.  Then click on the suggested listing, that is designed for the application you are using, and “voila!” You are now just one step away from making your driving experience even safer!

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