Will these work to replace my burnt out christmas lights? - the led element looks the same

These led diode's diode Head Diameter is 5mm,Pin Length is 18mm;Voltage：Red/Yellow：1.8V-2.3V；Blue/Green/White：2.8-3.6V；Electric current：20mA Mybe you could check this diode's dimension whether suitable for your christmas lights or not

Can these be wired with an AA battery pack?

Yes they are 3v so 2 AA Batteries would power them easily

What is the mcd, i'm trying to replace some led's in my old car and do not want them too bright.

I beleave this to be Max Current Direct, which means the maximum current to these LED's is 20mA. Either way if you are replacing LED's in your car, keep in mind that a car operates on 12VDC and with these LED's you'll need to install a resister inline with the LED, so for example you have a 2volt/20mA led you'll need a minimum of 500watt resister to make the LED function correctly. Now this would be it's brightest as it is max, a 1K resister will drop the voltage in half and will make the LED half as bright. Hope this helps.

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750 Pcs 3mm LED Light Emitting Diode Assortment Kit for DIY PCB Circuit | Low Voltage Diffused Diode for DIY PCB Circuit,Indicator Lights

Product ID: 118196507

🌈5 vibrant colors

💡8000 mcd brightness

🔌7W power consumption

AR$41190

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Description

✨ Light Up Your Creativity with Every Project!

EASY TO USE - Designed for seamless integration into any electrical setup—just plug and play!
DURABLE DESIGN - Crafted with oxygen resin to withstand high temperatures—built to last!
COMPREHENSIVE KIT - 750 pieces in 5 colors—never run out of options for your next project!
VERSATILE APPLICATIONS - Perfect for PCB circuits, Arduino projects, and more—let your creativity flow!
ILLUMINATE YOUR PROJECTS - Transform your DIY endeavors with high-quality LED chips that shine bright!

The 750 Pcs 3mm LED Light Emitting Diode Assortment Kit is a comprehensive collection of high-quality, low-voltage diodes perfect for DIY enthusiasts and professionals alike. With 750 pieces in five vibrant colors, these durable LEDs are designed for a variety of applications, including PCB circuits and Arduino projects. Each diode features a bright output of 8000 millicandela and is built to withstand high temperatures, ensuring reliability in any electrical setup.

Specifications

Item Dimensions W x H	0.12"W x 0.12"H
Unit Count	1 Count
Material Type	silver
Item Shape	Led Diode
Color Rendering Index	150
Power Consumption	7 Watts
Is Electric	Yes
Light Source Type	led
Light Color	red, White
Voltage	3.6 Volts
Brightness	8000 Millicandela
Connectivity Technology	Normal bulb
Indoor Outdoor Usage	Indoor
Controller Type	Push Button
Light Type	LED
Special Features	5 color:White,Yellow,Green,Red,Blue
Wattage	7 watts

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AR$41190

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In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

Secure transaction

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