Can these bulbs be used to replace the christmas led of the 5mm that are concave style?

... Depends entirely on the specifics of the "Christmas LED" (and what you mean by "concave style"). If the original string shares the same electrical characteristics as these, then sure--but there's no way to randomly guess what kind of LEDs you're trying to replace.

Do you have leds of 1.5 volts available?

I do not have any but there might be some out there. Try DigiKey or Mouser electronics.

Can I use a 9v battery

Dear customer, voltage range of these diodes are: R/Y 2.0-2.2V; B/G/W 3.0-3.2V. 9v battery could only be used with proper resistors. Thank you for asking and hope this answer could be helpful.

These + a 2-3 volt DC button battery and it lights up? Aside from a switch and the connections, anything else needed?

depends on the purpose of your use of the LED. I used several to illuminate a model r/c airplane with two 1.5 AAA batteries and an off and on switch. They can be soldered together plus to minus leads in series or connected by lengths of wire. Note: some require different voltages identified on the container lid

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DiCUNO 450pcs 5mm LED Diode, LED Light Kit Box 5 Colors, Mini LED Assorted Kit 5mm Round Top, Light Emitting Diodes for DIY Project, White/Red/Yellow/Green/Blue

DiCUNO 450pcs 5mm LED Diode, LED Light Kit Box 5 Colors, Mini LED Assorted Kit 5mm Round Top, Light Emitting Diodes for DIY Project, White/Red/Yellow/Green/Blue

Product ID: 45516130

Details

Brand
DiCUNO
Bulb Shape Size
B9
Incandescent Equivalent Wattage
100 Watt Hours
Light Type
LED
Specific Uses For Product
Indicator

🌈5 vibrant colors

💡30° focused beam angle

🔴450pcs total LEDs

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Details

Brand
DiCUNO
Bulb Shape Size
B9
Incandescent Equivalent Wattage
100 Watt Hours

Description

💡 Light up your creativity with every color in the spectrum!

MASSIVE 450 PCS LED KIT - Never run out of LEDs for your projects or creative experiments.
VIVID 5 COLOR SPECTRUM - White, Red, Yellow, Green & Blue for dynamic, multi-hue lighting effects.
PRECISION 5 MM ROUND LE DS - Compact size with perfect fit for breadboards and DIY electronics.
ORGANIZED KIT BOX INCLUDED - Keep your LEDs sorted and ready to power your next innovation.
BRIGHT EFFICIENT LIGHTING - Up to 20,000mcd luminous intensity ensures your projects shine brilliantly.

The DiCUNO 450pcs 5mm LED Diode Kit offers a professional-grade assortment of five vibrant colors—White, Red, Yellow, Green, and Blue—each delivering focused 30° beam angles and high luminous intensity up to 20,000mcd. Perfectly sized for DIY electronics, educational projects, and signal indicators, this kit comes neatly organized in a compact box, empowering millennial makers and tech enthusiasts to innovate with ease and style.

Specifications

ASIN	B073QMYKDM
Beam Angle	30 Degrees
Best Sellers Rank	#9,477 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in LED Lamps
Brand	DiCUNO
Brand Name	DiCUNO
Bulb Shape Size	B9
Color	White, Red, Yellow, Green, Blue
Color Temperature	8000 Kelvin
Connectivity Technology	Normal bulb
Control Method	App
Controller Type	Push Button
Customer Reviews	4.7 out of 5 stars 2,469 Reviews
Incandescent Equivalent Wattage	100 Watt Hours
Included Components	LED Diodes, Kit Box
Item Dimensions W x H	0.91"W x 3.66"H
Item Weight	170 Grams
Light Color	Blue
Light Output Maximum	2000 Lumens
Light Source Type	LED
Light Type	LED
Manufacturer	DiCUNO
Manufacturer Part Number	5C-5MM 450 L
Material Type	Plastic
Model Number	5C-5MM 450 L
Number of Items	1
Package Quantity	1
Shape	Round
Specific Uses For Product	Indicator lights
UPC	606046645177
Unit Count	450.0 Count
Voltage	2 Volts

Reviews

S**H

24.04.2021

A**R

8.12.2025

"**D

2.12.2025

Z**Y

17.05.2025

J**N

29.05.2022

M**9

2.05.2026

N**E

30.01.2018

X**G

18.03.2023

F**E

17.02.2026

M**Y

23.07.2025

A**W

4.05.2026

N**N

22.08.2023

H**S

4.11.2024

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