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

Dicuno 5mm Bi Pin Led Diode | Desertcart Finland

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Description

✨ Light up your genius with DiCUNO’s 450-piece LED kit! 🎨

MULTI USE MASTERPIECE - Perfect for tech innovators, educators, and hobbyists—ideal for science experiments, car décor, signal indicators, and beyond.
PLUG PLAY VERSATILITY - Standard 5mm round LEDs with clearly marked anode/cathode pins, compatible with breadboards and all your electronic experiments.
ENGINEERED FOR EFFICIENCY - Low forward voltage (2.0-3.2V) and 20mA max current for energy-smart, long-lasting illumination without compromise.
PRECISION BRIGHTNESS CONTROL - Each LED delivers optimized luminous intensity up to 20,000mcd, ensuring your designs shine with professional-grade clarity.
ULTIMATE DIY LIGHTING ARSENAL - 450 premium 5mm LEDs in 5 vibrant colors, perfectly sorted in a sleek kit box to keep your projects organized and on point.

The DiCUNO 450pcs 5mm LED Diode Kit offers a comprehensive set of 5 colors (90pcs each) with high brightness and energy-efficient design. Featuring a 30° beam angle and clear polarity markings, this kit is tailored for DIY electronics, educational projects, and creative lighting solutions, all neatly organized in a durable box for easy access and storage.

Specifications

ASIN	B073QMYKDM
Accepted Voltage Frequency	220 to 240 Volts and 50 Hertz
Additional Features	Super bright 5mm LED, 450 pcs (5 color * 90 pcs) ; Mark color and voltage clearly in label. Box Kit for sorting. Don’t worry you will mix them up or lose them. Widely applied to DIY LED Projects, School Science Experiments, Car Decorations, etc.
Beam Angle	30 degrees
Best Sellers Rank	#11,038 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in LED Lamps #3,420 in Electrical Equipment
Brand Name	DiCUNO
Bulb Base	Prong
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 4.7 out of 5 stars (2,481)
Efficiency	High
Incandescent Equivalent Wattage	100 watt-hours
Included Components	LED Diodes, Kit Box
Indoor Outdoor Usage	Indoor
Item Dimensions W x H	0.91"W x 3.66"H
Item Weight	170 g
Light Color	Blue
Light Source Type	LED
Light Type	LED
Manufacturer	DiCUNO
Manufacturer Part Number	5C-5MM 450 L
Material Type	Plastic
Model Name	5C-5MM
Model Number	5C-5MM 450 L
Number of Items	1
Package Quantity	1
Power Source	Corded Electric
Shape	Round
Specific Uses For Product	Indicator lights
Style Name	Modern
UPC	606046645177
Unit Count	450 Count
Voltage	2 volts
White Brightness	2000 lumens

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€ 37.00

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered 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 Finland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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DiCUNO 5mm Bi-pin LED Diode

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