I don't understand the need for the resistors. they don't step down the voltage and the led will only draw the amperage it needs without them?

You cannot connect an LED direct to any voltage without a resistor, as it is not a linear resistance. Below a certain voltage, it won't conduct or light, but above a certain voltage (between 2-3 volts for typical LEDs) the LED will suddenly conduct large amounts of current resulting in very high power dissipation. Even if the LED does not burn out quickly, it will run hot. The resistor is installed in series with the LED to prevent that. I have used various colors of pre-wired EDGELEC LEDs available on Amazon, and they work very well off a range of voltages from 7 to 12 volts, and draw around 10 mA. The White LEDs are high efficiency, and are surprisingly bright, such that a single one could be used for a flashlight.

can these leds be used in an automotive application? (12v, high amperage)

they are 12v, will draw the current they require. not sure your high amperage comment?

Using a 12v source, is it common that the resistor is burning hot almost melting the heatshink over the resistor??? different power and 10 LEDs sofar

No, it should not get that hot.

what gauge wire are they?

Looks like 24 or 26. I have to double the wire to use in a crimped connector like a power pole.

120pcs 12v Led Lights Emitting Diodes Pre Wired Dc 12

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Description

💡 Light up your projects with pro-grade color and longevity!

COLOR YOUR CREATIVITY - Six vivid diffused lenses (White, Red, Yellow, Green, Blue, Orange) to elevate any project or décor.
PLUG PLAY BRILLIANCE - Prewired with built-in resistor for instant 12V compatibility—no guesswork, just glow.
DURABILITY MEETS DESIGN - 20,000+ hours lifespan ensures your lighting stays flawless through every late-night brainstorm or weekend DIY.
PREMIUM WIRING FOR PROS - 7.8-inch 7-core pure copper wire with tin coating for superior conductivity and effortless soldering.
VERSATILE LIGHTWEIGHT - Perfect for hobbyists, electronics, marine use, and stylish indoor/outdoor accents—lightweight yet robust.

This 120-piece kit features prewired 5mm LEDs designed for 12V DC circuits, each with a built-in 0.25W metal film resistor for stable operation. Offering six diffused colors with 20 pieces each, these LEDs boast a 20,000+ hour lifespan and premium 7-core pure copper wiring for easy installation and reliable conductivity. Ideal for DIY electronics, decorative lighting, and professional projects, this set delivers vibrant, durable illumination that keeps your ideas shining bright.

Specifications

ASIN	B07PVVL2S6
Accepted Voltage Frequency	100 to 240 Volts and 50 Hertz to 60 Hertz
Additional Features	Lightweight
Brand	EDGELEC
Brand Name	EDGELEC
Bulb Base	E26
Bulb Shape Size	B9
Bulb base	E26
Bulb shape/size	B9
Color	[01] 6 Colors X 20 Pcs / 120 Pcs
Connectivity Technology	Normal bulb
Control Method	Touch
Controller Type	Push Button
Country of Publication	China
Customer Reviews	4.7 out of 5 stars 1,667 Reviews
Efficiency	1200 lumens per watt
Incandescent Equivalent Wattage	37.5 Watts
Incandescent equivalent wattage	37.5 Watts
Indoor Outdoor Usage	Outdoor
Item Dimensions W x H	21.2W x 1.8H centimeters
Item Weight	0.46 Pounds
Light Color	Multicolored (White, Red, Yellow, Green, Blue, Orange)
Light Output Maximum	300 Lumens
Light Source Operating Life	20000 Hours
Light Source Type	LED
Light Source Wattage	0.25 Watts
Light Type	LED
Light type	LED
Manufacturer	EDGELEC
Manufacturer Part Number	ED_DLP03D
Material Type	Metal
Model Number	PW-DIP LED
Number of Items	1
Package Quantity	120
Power Consumption	0.25 Watts
Power Source	Corded Electric
Shape	Round
Smart Home Compatibility	Not Smart Home Compatible
Special features	Lightweight
Specific Uses For Product	Indoor
Style Name	5mm
UPC	611355171996
Voltage	12 Volts (DC)
White Brightness	30 Lumens

Reviews

L**R

Great quality

Great LED's with terrific colours. Ready to be connected directly to 12v. I am using them in a marine environment with great results. Sent to me on time and well packaged.

10.10.2024

J**R

Nice collection of colors they're 12 volt.

A nice collection of color LEDs are 12 volt I bought these because I was a nice collection of color LEDs are 12 volt I bought these because I was making a and LED Vue meter I'm afraid I don't have anything else to say other than their LEDs that's pretty much what they are.

10.05.2026

F**N

Well Designed.

Perfect lights for dash on Harley. Will never forget to turn something off. Will see what is on.

30.12.2023

E**E

Calidad

Es justo lo que necesitaba, muy bien protegido funcionan al 💯👍

7.12.2024

S**N

Timesaver

Great to teach kids about LEDS, and for projects. Resistors built in so just add a battery of other DC source.

12.12.2025

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