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| Size | 3mm Round Top Frosted / Milky Diffused LED |
|---|---|
| Color | UV / Purple |
| Luminosity/Brightness | 2,000-3,000 mcd |
| Forward Voltage | 3.0-3.4v |
| Current | 20mA |
| Wavelength | 395-405nm |
| Viewing Angle | Diffused |
| Mount Style | Through Hole (DIP) |
| Lens Color | Frosted / Milky / White - Not Colored |
| LED Brightness Class | Super/Ultra/Extreme |
Lighthouse LEDs has been providing top quality components for over 20 years and have become the go-to supplier for many industries through Ebay and our personal website, where there is more ordering flexibility and products offered. If you need resistors, wire, heatshrink, switches or LED drivers you can find them at those links. We have, perhaps, the best and widest selection of LEDs out there!
3mm diffused UV/purple LEDs with a frosted milky lens are the go-to choice when you need a wide, even glow — no hot spot, no harsh beam — from a compact through-hole component that fits tight layouts and detailed builds.
These LEDs operate at a forward voltage of 3.0–3.4V at 20mA, emit at 400nm in the UV/purple spectrum, and deliver 2,000–3,000 mcd of output. The 3mm body and 120° viewing angle make them ideal wherever broad, uniform illumination matters more than a focused point source. The frosted milky lens diffuses the light naturally, so the lens itself glows rather than projecting a sharp beam — a look that suits indicators, accents, and ambient effects particularly well.
Common applications
- Black-light effects in haunted house props, escape room builds, and Halloween displays — activates fluorescent paints and UV-reactive materials cleanly
- Model railroad UV effects: fluorescent building signs, nightclub windows, and neon-glow details in HO and N scale layouts
- RC body interior ambient lighting — wide angle fills cockpits and cabin spaces evenly without hot spots
- DIY neon-look panel indicators and instrument cluster accent lighting in custom car audio and automotive interior projects
- Stage and cosplay prop lighting — helmet visors, armor trim, and wearable builds where a diffuse purple glow reads better than a focused beam
- Sterilization and curing indicator lights in DIY UV resin printing and small-scale lab setups
Wiring & power notes
DC power recommended: LEDs are designed for DC. Running on AC will cause flickering and reduce lifespan. If using a low-voltage AC source (model railroad transformer, DCC track voltage), convert it to DC with a MB1S bridge rectifier plus a 100µF 50V electrolytic capacitor for clean, ripple-free output.
Resistor quick reference — 3V LEDs (blue, green, white, UV) at 20mA:
| Supply Voltage | Resistor | Power Rating |
|---|---|---|
| 4V | 56Ω | 1/4W |
| 5V | 100Ω | 1/4W |
| 6V | 150Ω | 1/4W |
| 7V | 200Ω | 1/4W |
| 8V | 270Ω | 1/4W |
| 9V | 300Ω | 1/4W |
| 10V | 360Ω | 1/4W |
| 11V | 430Ω | 1/4W |
| 12V | 470Ω | 1/4W |
| 13V | 510Ω | 1/4W |
| 14V | 560Ω | 1/2W |
| 15V | 620Ω | 1/2W |
Prefer not to calculate resistor values? Our 20mA LED Current Limiter eliminates the math entirely. Active constant-current drive to 20mA across a 4–45V DC supply — ideal for automotive circuits where voltage fluctuates. Multiple LEDs in series share one driver.
Building with this item
Need supporting components? These pair directly with this listing:
- Panel mount holder (Black): 3mm LED Holder/Bezel (Black) — through-panel bezel with lock ring and insert
- Panel mount holder (Chrome): 3mm LED Holder/Bezel (Chrome) — silver/chrome finish alternative
Quality LEDs made in the USA since 2005.
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