This lets the LED appear to response like an incandescent lamp. I checked one of these decoders and found that for “Rule 17" dimming the power was reduced to under 10% for the LED and only 35% for a lamp. A 1K (1000) Ohm 1/4 Watt resistor will work. If space is tight use a 1.5K 1/8 watt resistor. Wiring LEDs. When connecting an LED to a I tow some trailers at work with led's and no resistors and they are a pain as you don't know from the cab if your indicators are actually working , don't think you will do the lights any damage without resistors. Edited May 14, 2012 by alastair0903 In comparison, LED bulbs can have 50,000 to 100,000 hours of light, making them better investments. Can I Replace Incandescent Bulbs with LED in My Car? Yes! You can change your initial bulbs to LED in your vehicle. In addition, there are different places where you might want to swap out for LED lights. Resistor = (Battery Voltage – LED voltage) / desired LED current. So assuming a 12-volt power source and a white LED with the desired current of 10 mA; The formula becomes Resistor = (12-3.4)/.010 which is 860 ohms. Since this is not a standard value I would use an 820-ohm resistor. We also need to determine the power rating (watts) of the R1 = 6 ohm. R2 = 6 ohm. Rtotal = 6*6/6+6 = 36/12 = 3 ohm. so one could use one 3 ohm resistor but you would need to double the wattage rating to handle the additional power lost to heat since the single resistor would need to dissipate the power that the two resistors dissipated before. Taking a typical power COB LED datasheet, forward voltage is 2.25V typical at 350mA, so if you decide to run it at 250mA/25mA you'd use resistors of about 20 ohms/200 ohms. You can't compare lumens directly because the LEDs are more directional than the incandescent bulbs and the filter absorbs a lot of the light (everything that isn't red). I purchased the Mopar LED Headlight kit (part number: 82215136AE) from BAM at a price of $749.25, free shipping UPS ground, and the LED fog lamp kit for another $224 plus $8 shipping USPS. The headlights arrived in a large box containing two individual boxes, each with one head lamp 'suspended' between two plastic sheets to avoid impact damage. Putting an LED resistor - 2016 mk6 Jetta HELP. So I'm getting pretty frustrated with seeing the bulb out warning in my dash and I'm planning and putting a resistor tomorrow morning. The problem is that about a year ago, I attempted to put a resistor on the outer brake light but either I installed it incorrectly or there is something about the and the power dissipation will be about. Pd = 2402/R 240 2 / R. So for 2mA, R = 108K 0.53W (you could use 110K 1W or go slightly up in current and use 100K 1W) A high voltage resistor is required if you want reliability and safety (because the mains can have huge transients on it), and it likely should be a fusible type. MTrWdZw.

do i need resistors for led headlights