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| Size | 3mm Round Top Diffused |
|---|---|
| Color | Pure Green |
| Luminosity/Brightness | 8,000-10,000 mcd |
| Forward Voltage | 3.0-3.4v |
| Current | 20mA |
| Wavelength | 515-525nm |
| Viewing Angle | Diffused |
| Mount Style | Through Hole (DIP) |
| Lens Color | Diffused In Emitting Color |
| 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 Pure Green Diffused Round Top LEDs — a natural fit for any project where you need a wide, soft green glow rather than a pinpoint beam. The 120° viewing angle and diffused lens make these ideal for indicator lights, model interiors, and glow effects where harsh hot-spots would ruin the look.
Each LED runs at a forward voltage of 3.0–3.4V at 20mA and emits pure green light at 520nm, delivering 8,000–10,000 mcd of brightness through a diffused lens that spreads light evenly across the full 120° cone. At 3mm diameter, they drop directly into standard 3mm mounting holes and fit the most common LED clip hardware without modification.
Common applications
- Model railroading: HO scale building interiors and signal heads, N scale crossing flashers, locomotive cab lighting — the diffused lens eliminates hot-spots that look unnatural at small scale.
- Warhammer & miniature gaming: Nurgle rot-glow, Necron eye effects, plasma weapon OSL on Dreadnoughts and Daemon Princes — green 3mm LEDs are the go-to for chaos/undead lighting projects.
- RC car bodies: Drilled through polycarbonate shell (3.2mm / ?" bit) for undercar glow or interior accent lighting on 1:10 and 1:8 scale builds.
- Military dioramas (1:35): Instrument panel and status indicator lighting on AFV builds; also useful for eerie green ambient glow in bunker or night-ops scenes.
- Panel indicator replacement: Vintage lab equipment, ham radio rigs (Kenwood, Yaesu, ICOM), PLC boards, and oscilloscope front panels — direct swap for original 3mm green incandescent indicators.
- Electronics prototyping: Arduino/Raspberry Pi GPIO status indicators, perfboard builds, breadboard power-on indicators.
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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