do those leds need a resistor , if so what kind , my leds are getting very hot , is this normal?
590512
If the leds have more than 55watts then us if under 30watts then their fine
590513
NO, these LED lights do not need a resistor at 12V. Smart cars (??) with lamp-out detector will need a shunt resistor across the light socket to fool the system into believing it has an incandescent bulb installed. The LED doesn't need the resistor, the stupid car does.
590514
I haven't had any issues with mine, it all friends how you wired them all, I used sodering, and hooked them up to a 12v circuit on my car
590515
this one is 3W. over or less than 3W you do need resistor but that is depend on where your install.
1432485
Dear valued customer Some vehicle is still required to be installed with load resistor because the power consumption of LED bulb is far below than the original value of halogen bulb. Consumers generally accept this factor and use them anyways, despite the appearance of error messages. This is not a problem with the quality of our products. you might need to add 50W 6Ohm LED Load Resistors with LED bulb to eliminate error message. Thanks
2244216
It calculates to 440 ohm 1/4 watt resistor. You may be able to use a 420. Are you really only using 1 resistor with the 12 volt supply? I would put more LEDs in series. Like 3 LEDs with 135 ohms. Or 4 in series with no resistor.
1668821
Not necessary, connecting these resistors will create proper load for your LED light to flash normal.
1909513
Yes, you'd need three 100 ohm resistors. Check out this website, http://led.linear1.org/led.wiz for building more complex LED arrays.
1499711
These LED's only have two leads. The longer Lead is the Anode +,and the shorter Lead is the cathode - . Use a 1/2 watt 1k resistor in series with a 12 volt supply. The LED flashes and changes color all on it's own with a built in microchip. It looks like a tiny black speck inside the LED. It has no effect on the brightness. I think these Led's are a great buy for the money. They did not come with 1 k resistors. I forgot what they came with. Important you use 1 (1k ) resistor per LED in series. Look up charts on LED's brightness,current draw , voltage and proper voltage drop resistor for you application. These LED's only have two leads. The longer Lead is the Anode +,and the shorter Lead is the cathode - . Use a 1/2 watt 1k resistor in series with a 12 volt supply. The LED flashes and changes color all on it's own with a built in microchip. It looks like a tiny black speck inside the LED. It has no effect on the brightness. I think these Led's are a great buy for the money. They did not come with 1 k resistors. I forgot what they came with. Important you use 1 (1k ) resistor per LED in series. Look up charts on LED's brightness,current draw , voltage and proper voltage drop resistor for you... » Read More These LED's only have two leads. The longer Lead is the Anode +,and the shorter Lead is the cathode - . Use a 1/2 watt 1k resistor in series with a 12 volt supply. The LED flashes and changes color all on it's own with a built in microchip. It looks like a tiny black speck inside the LED. It has no effect on the brightness. I think these Led's are a great buy for the money. They did not come with 1 k resistors. I forgot what they came with. Important you use 1 (1k ) resistor per LED in series. Look up charts on LED's brightness,current draw , voltage and proper voltage drop resistor for you application. « Show Less
2114270
I've used LEDS only and they been running perfectly for 6-7 months now. I recommend you check the ones made by Torchstar if you are talking about MR16s. Their new line of LEDs match halogen output as well as color. I posted a detail review with a bunch of pictures.
172411
LED's are fully dimmable and do not create any significant heat - should be A OK in a brown out situation.
2104272
The lights have a built in resistor, this can go bad giving you the exact symptoms you've described. I had the same issue.
1691732
I do not know that answer, but I havebthe same issue. It's like they are on a "low" setting. I'm wondering if a resister is needed in line to eliminate that issue?
886922
Higher operating temperatures may shorten the life of an LED but I don't think it's something to be worried about. Colder temps should have no effect on it.
649545
The ic rating is usually only concidered a factor when using incandescent bulbs.....because they emit a lot more watts = heat. These LEDs don't get hot at all! I left them on for many hours, after the initial install, and checked to see how hot they were and they were still slightly above room temperature.
449850
These are a little bluish, maybe around what you're looking for. I'd guess that they're a little higher than 7000K. Felix is correct that these are very bright when run at ~13.5 to 14.0V, I run mine at 13.8V. Lahiru is dong something wrong. FYI, if your strip is longer than, maybe, 10' I'd run the supply wires to both ends. If I ran the full 30' strip I'd run the supply to both ends and the middle. Why? Because there will be enough of a voltage drop along the copper traces on the strip that the LED's on the end will be noticeably dimmer if you only connect to one end.
1865495
Certainly sounds like you wired it correctly. Just remember that LEDs are polarity sensitive, so make sure your positive is on the red wire. If that is confirmed, then I have nothing more to suggest.
780513
Just took a multi meter to them while off. It read 0.5 ohms across 3 LEDs @ the cut points... Hope that helps.. Doesn't seem right to me for some reason...
1228833
It all depends on how hot the innards of the actual LEDs and the ICs (chips) on the circuit boards get. So long as they're keeping the devices "cool" then it doesn't matter if the box gets hot. However, a hot plastic box is usually a sign of even hotter innards - most plastics are quite poor conductors of heat. There's a photo of a "Luxcine" LED projector on an eBay auction page I saw. That thing had a fancy-looking heat pipe and heatsink assembly for keeping the LEDs cool. I am intrigued as to what LG have done in this puppy.
47908
They are not LEDs, they are infered bulbs that you should not see any more then a faint red glow from. Try using the camera at night if u can see in the dark they are functioning.