5mm Round Top UV / Purple LED - Ultra Bright

The 5mm round top uv / purple led is one of the most popular sizes out there for a large percentage of projects and products.

In stock

SKU
5MMROUNDTOPUVPURPLE
Color
UV / Purple
Size
5mm Round Top Clear
$0.49
  • Buy 50 for $0.47 each and save 4%
  • Buy 100 for $0.44 each and save 10%
  • Buy 250 for $0.42 each and save 14%
  • Buy 500 for $0.39 each and save 20%
  • Buy 1000 for $0.36 each and save 27%

Description / 5mm Round Top UV / Purple LED - Ultra Bright

The 5mm UV Purple LED (Round Top, Clear) is the standard through-hole LED for true UV/blacklight effects (395-405nm), fluorescent material activation, escape room UV clues, mineral inspection. Clear lens with a focused 20-30 Degrees beam — bright and directional, the classic DIP LED that fits every breadboard, panel bezel, and holder on the market.

The 5mm (T-1¾) is the most popular LED size in the world — the standard for breadboard prototyping, hobby projects, panel indicators, and every electronics starter kit. Fits all 5mm holders and bezels.

Important UV note: True UV LEDs (like this one) emit ultraviolet light at 395–405nm, which often appears as a deep blue or violet hue to the human eye rather than a vivid purple. This is normal and expected — real UV light is at the edge of visible perception. The perceived color can change depending on what the light is shining on (fluorescent materials will glow brightly) and the ambient lighting in the room. In a dark room, the LED itself will look blue-violet; in a lit room, it may appear dimmer than other LED colors because most of the output is in the invisible UV spectrum. True UV LEDs also have lower visible light intensity than other colors — this is inherent to the wavelength, not a defect. If you want a vivid, visibly bright purple without UV properties, see our diffused purple LEDs instead.

Size5mm (T-1 3/4)
Forward Voltage3.0-3.4v
Brightness2,500-3,500mcd
Viewing Angle20-30 Degrees
LensClear — focused beam
PackageT-1 3/4 through-hole DIP
Drive Current20mA typical

Common applications

  • True UV blacklight effects: Activates fluorescent paints, inks, and fabrics for haunted houses, escape rooms, and stage productions. This is a genuine UV LED outputting at 395–405nm.
  • Escape room puzzles: Hidden UV-reactive messages, invisible ink clues, glowing artifact props.
  • Cosplay glow effects: UV-reactive costume elements that glow under blacklight at conventions.
  • Mineral and currency inspection: UV LEDs reveal fluorescent minerals and security features on banknotes.
  • Resin curing: Some UV-cure resins respond to 395–405nm LEDs for hobby-scale curing.

Standard T-1 3/4 through-hole footprint. Fits all 5mm LED holders, bezels, and panel-mount clips. Add a current-limiting resistor matched to your supply voltage — see our LED Resistor Calculator for the exact value.

Need a wider beam? See our 5mm Diffused Round Top LEDs (soft glow, no hotspot) or 5mm Straw Hat LEDs (120–140° wide angle).

Resistor quick reference (20mA):
SupplyResistorRating
5V100Ω1/4W
9V300Ω1/4W
12V470Ω1/4W
15V*620Ω1/2W
18V750Ω1/2W

*Use 15V instead of 12V for vehicle/alternator sources to account for charging voltage (13.8–14.4V).

Full LED Resistor Calculator → for other voltages, series strings, and parallel configurations. Or skip the math with our 20mA Current Limiter (2–45V DC).

Frequently Asked Questions

Yes. Standard LEDs require a current-limiting resistor matched to your power supply voltage. Use our LED Resistor Calculator at /blog/led-resistor-calculator.html to find the exact value.
Clear lens LEDs produce a focused, directional beam (15-30 degrees) — bright when viewed head-on. Diffused lens LEDs scatter light evenly for a soft glow visible from all angles. Use clear for signals and indicators; use diffused for ambient lighting and props where the LED is visible.
Yes. Connect through a current-limiting resistor (typically 220-330 ohm for 5V) to any digital output pin. The LED Resistor Calculator can help you find the exact value for your setup.

DC power recommended: LEDs are designed for DC. Running on AC will cause flickering and reduce lifespan. If you're using a low-voltage AC source — such as a model railroad transformer output or DCC track voltage — convert it to DC first with a bridge rectifier.

Also available: 3mm (smaller)

Sold individually (1 LED per quantity ordered).

PCB Design: KiCad footprint: LED_THT:LED_D5.0mm (built-in with KiCad). EasyEDA: search “LED_D5.0mm” in the built-in library. Download KiCad files ↓

Specifications are sourced from manufacturer data and may be updated without notice. While we work to keep product information accurate, always verify critical parameters against the manufacturer's datasheet for production designs. Found an error or discrepancy? Let us know — we genuinely appreciate the correction.

More Information

Size 5mm Round Top Clear
Color UV / Purple
Luminosity/Brightness 2,500-3,500 mcd
Forward Voltage 3.0-3.4v
Current 20mA
Wavelength 395-405nm
Viewing Angle 20-30 Degrees
Mount Style Through Hole (DIP)
Lens Color Clear
LED Brightness Class Super/Ultra/Extreme
Documentation Link Documentation: 5mm Round Top UV / Purple LED - Ultra Bright Datasheet / Specifications

Customer Images

Share your photos of this product in action! Uploaded images require approval before display. Please do not include watermarks — watermarked images will be declined. By uploading, you agree that your images may be used as product photos, in tutorials, or related content. Customer photos may not exactly represent this product. Items shown may be modified, and LED colors may appear different due to the difficulty of capturing true light colors on camera.

Have a photo of this product in action? Log in to share it.

Customer Reviews

Quality
Shipping
Service
Order delivered on time with no issues
Review by Verified Buyer
Order delivered on time with no issues
Quality
Shipping
Service
Quick shipping, they look great!
Review by Verified Buyer
Quick shipping, they look great!
Quality
Shipping
Service
Order delivered on time with no issues
Review by Verified Buyer
Order delivered on time with no issues
Quality
Shipping
Service
Order delivered on time with no issues
Review by Verified Buyer
Order delivered on time with no issues
Quality
Shipping
Service
Great thanks
Review by Verified Buyer
Great thanks
Quality
Shipping
Service
Arrived as described in new condition. These LEDs emit a...
Review by Verified Buyer
Arrived as described in new condition. These LEDs emit a very noticable purple color and makes fluorescent materials glow. They have consistent light output across the different LEDs. I do have a 365nm light source to compare these and these LEDs do the job almost as good. These LEDs are good value for the money.
Quality
Shipping
Service
Fast shipping and good LEDs.
Review by Verified Buyer
Fast shipping and good LEDs.
Quality
Shipping
Service
LightHouse is the best sources for LED lights!
Review by Verified Buyer
LightHouse is the best sources for LED lights!
Quality
Shipping
Service
Fast shipping
Review by Verified Buyer
Fast shipping
Quality
Shipping
Service
10/10 would buy different shapes again
Review by Verified Buyer
10/10 would buy different shapes again

Items 1 to 10 of 19 total

Write Your Own Review
You're reviewing: 5mm Round Top UV / Purple LED - Ultra Bright
Your Rating:
Service
Shipping
loader
Loading...

You submitted your review for moderation.