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.

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120pcs 12V LED Lights Emitting Diodes, Pre Wired 7.9 Inch DC 12 Volt 5mm LED (6 Colors x 20pcs) Assorted Kit Diffused Colored Lens- White Red Yellow Green Blue Orange Small LED Lamps

120pcs 12V LED Lights Emitting Diodes, Pre Wired 7.9 Inch DC 12 Volt 5mm LED (6 Colors x 20pcs) Assorted Kit Diffused Colored Lens- White Red Yellow Green Blue Orange Small LED Lamps

Product ID: 374368866

Details

Brand
EDGELEC
Bulb base
E26
Bulb shape size
B9
Light type
LED
Special feature
Lightweight

⏳20,000+ hours lifespan

🌈6 vibrant diffused colors

🔋12V DC stable power

Description

🌟 Light up your projects with pro-grade brilliance and color—because ordinary just won’t do!

LONG LASTING BRILLIANCE - Over 20,000 hours of reliable illumination keeps your projects glowing for years.
VERSATILE DIY ESSENTIAL - Perfect for hobbyists, decorators, and professionals seeking vibrant, durable LED solutions.
VIVID MULTICOLOR ASSORTMENT - Six diffused colors (White, Red, Yellow, Green, Blue, Orange) with 20 pieces each to spark creativity.
PREMIUM WIRING FOR PRO RESULTS - 7.8-inch 7-core pure copper wire with tin coating offers superior conductivity and easy soldering.
PLUG PLAY PREWIRED CONVENIENCE - Built-in 0.25W resistor ensures instant, stable 12V operation—no guesswork, no hassle.

This 120-piece LED kit features prewired 5mm diffused LEDs in six vibrant colors, each with a built-in 0.25W resistor optimized for 12V DC circuits. With a lifespan exceeding 20,000 hours and premium 7-core copper wiring, it’s engineered for stable, long-lasting performance in DIY, decoration, and electronic projects.

Specifications

Asin	B07PVVL2S6
Average Life Span	20000 Hours
Best Sellers Rank	73,073 in Business, Industry & Science (See Top 100 in Business, Industry & Science) 170 in LED Diodes
Brand Name	EDGELEC
Bulb Base	E26
Bulb Shape Size	B9
Colour	[01] 6 Colors X 20 Pcs / 120 Pcs
Connectivity Technology	USB
Control Method	Touch
Controller Type	Push Button
Country Of Origin	China
Customer Reviews	4.7 4.7 out of 5 stars (1,681) 4.7 out of 5 stars
Eu Energy Efficiency Label	1200 lumens per watt
Incandescent Equivalent	37.5 Watts
Indoor Outdoor Usage	Outdoor
Item Dimensions W X H	10W x 14H millimetres
Item Shape	Round
Item Weight	0.46 Pounds
Light Color	Multicolored (White, Red, Yellow, Green, Blue, Orange)
Light Output Maximum	300 Lumens
Light Source Wattage	0.25 Watts
Light Type	LED
Manufacturer	EDGELEC
Manufacturer Part Number	ED_DLP03D
Material Type	Metal
Model Name	PW-DIP LED
Model Number	PW-DIP LED
Number Of Items	1
Package Quantity	120
Power Consumption	0.25 Watts
Power Source	Electrical (DC)
Special Features	Lightweight
Specific Uses	Decoration
Style Name	5mm Round Lens
Type Of Bulb	LED
Unit Count	120.0 count
Upc	611355171996
Voltage	12 Volts (DC)
White Brightness	30 Lumens

Reviews

User

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

User

Good quality for the price

I held purchases for my father he was extremely happy with them. He has continued to use them on other vehicles

26.09.2025

User

Sehr hell und gleichmäßig.

Gute und erstaunlich gleichmäßige Helligkeit schon bei kleinen Spannungen, bei 12V schon fast zu hell für viele Anwendungen.

29.06.2026

User

Excelente producto

Son muy fáciles de instalar, se adaptan bien a los tranajos que se quieran elaborar. Luces muy brillante.

21.01.2022

User

Fonctionne très bien

Très satisfait belle couleur

14.03.2026

User

Precableado Bien. Luz de poca intensidad

Llegó en tiempo y forma. Buena calidad de soldadura y protección con termoencogible. La luz que emiten los leds es de baja intensidad.

10.03.2024

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