▶️ Watch: 12V Single-Colour SMD LED String (5 Inch, Copper) Demo
📄 Overview
Premium KDN 12V single-colour SMD LED string made with pure copper wire (iron-free: passes the magnet test) — 50 LEDs per bunch (~20 feet), 5-inch spacing, ~6W per string, waterproof, 7 colours. Even brightness on long runs and reusable every festival; less than ₹5 per foot. Ideal for building outlines, gates, Thorans and chasing effects with a 12V chaser.
📋 Specifications
| Specification | Details |
|---|---|
| Input Voltage | 12V DC |
| LED Type | SMD, single colour |
| Spacing | 5-inch gap between LEDs |
| Per String / Bunch | 50 LEDs, approx 20 feet |
| Power Consumption | Approx 6W per string (1 bunch) |
| Wire | Copper |
| Waterproof | Yes — outdoor safe |
| Colours | Blue, White, Green, Warm White, Pink, Red, Yellow (7 colours) |
| Best For | Building outline, Thoran, gate, balcony, festive decoration |
| Brand | Koshi Electronics (KDN) |
📖 User Manual
Premium KDN-brand 12V single-colour SMD LED string made with pure copper wire — the go-to choice for outlining buildings, Thorans, gates and festive décor. Bright, even light from the first LED to the last, built to last season after season.
🧲 All LED strings look the same. The wire inside is not.
Many low-priced LED strings use iron wire inside a coloured coating, so from outside they look exactly like ours. Our KDN strings use pure copper wire.
Check it yourself with a magnet: hold a magnet to the wire. Iron wire sticks. Copper wire does not. Try it on any LED string before you buy.
सारी LED लड़ी बाहर से एक जैसी दिखती है, लेकिन अंदर का तार नहीं। सस्ती लड़ी में अक्सर लोहे का तार होता है — चुंबक लगाकर देखें: लोहा चिपकता है, तांबा नहीं।
Many low-priced LED strings use iron wire inside a coloured coating, so from outside they look exactly like ours. Our KDN strings use pure copper wire.
Check it yourself with a magnet: hold a magnet to the wire. Iron wire sticks. Copper wire does not. Try it on any LED string before you buy.
सारी LED लड़ी बाहर से एक जैसी दिखती है, लेकिन अंदर का तार नहीं। सस्ती लड़ी में अक्सर लोहे का तार होता है — चुंबक लगाकर देखें: लोहा चिपकता है, तांबा नहीं।
SMD vs DIP LED — Which Is Better?
Copper Wire vs Iron Wire — Why It Matters
| Koshi KDN (Copper) | Cheap LED (Iron wire) | |
|---|---|---|
| Magnet test | ✅ Does not stick | ❌ Sticks |
| Brightness on long runs | ✅ Even from first to last LED | ❌ Last LEDs often look dim — iron carries current poorly |
| Rain & moisture | ✅ Copper does not rust | ❌ Iron rusts inside, joints fail |
| Bending & handling | ✅ Flexible, easy to fit and store | ❌ Breaks sooner when folded again and again |
| Repair & soldering | ✅ Solders cleanly | ❌ Hard to solder and repair |
| Reuse next festival | ✅ Use it again and again | ❌ Often needs replacing |
💰 Real cost: one bunch covers about 20 feet — that is less than ₹5 per foot. A cheap string that has to be replaced next season costs you more in the end, plus the labour of fitting it again.
How Many Bunches Do I Need?
Measure the length you want to light and divide by 20. Each bunch uses about 6W, so pick a 12V SMPS with some spare capacity.
| Length to light | Bunches | Power (approx) | 12V SMPS |
|---|---|---|---|
| 20 ft | 1 | 6W | 2A or above |
| 100 ft | 5 | 30W | 5A |
| 200 ft | 10 | 60W | 10A |
| 500 ft | 25 | 150W | 20A |
⚠️ 12V DC only. Never connect these LEDs directly to 220V mains — always use a 12V SMPS.
Specifications
| Specification | Detail |
|---|---|
| Voltage | 12V DC |
| LED | SMD, single colour |
| Spacing | 5-inch gap between LEDs |
| Per String / Bunch | 50 LEDs, approx 20 feet |
| Power Consumption | Approx 6W per string (1 bunch) |
| Wire | Pure copper (magnet test safe) |
| Waterproof | Yes — outdoor safe |
| Colours | Blue, White, Green, Warm White, Pink, Red, Yellow |
Key Features
- Pure copper wire — even brightness, no rust, reusable every festival
- Low power — just ~6W per string (1 bunch), so more strings per SMPS
- Waterproof — safe for outdoor buildings, gates and Thorans
- 7 colours — Blue, White, Green, Warm White, Pink, Red, Yellow
- 50 LED per bunch (~20 feet), even 5-inch spacing
- Perfect for chasing / running effects with a 12V chaser
Best For
- Building outlines, Thorans, gates & balconies
- Diwali, Navratri, Ganpati (Ganesh Chaturthi) & large-scale festive decoration
- Running / chasing effects with a 12V single-colour chaser
DIY Project — Build Your Own LED Setup
Want to build your own chaser decoration with these LEDs? Watch the complete step-by-step process below:
Everything you need for your setup:
- 12V Single-Colour LED (this product) — all options: 12V Single Colour LED Collection
- 12V Manual Chaser — 12V LED Manual Chaser Controller
- 12V SMPS Power Supply — 12V Rainproof Heavy Duty SMPS
- Ferrule (Wire ID Markers) — Cable Markers / Ferrules
- 2-Pin Connector — 2 Pin Male & Female Connector
Need a Ready-Made Setup?
Don't want to build it yourself? See our 12V Ready-Made LED Setup — plug & play, ready to install.
Koshi Electronics — Pixel LED & single-colour lighting solutions. Contact us for bulk enquiries.
❓ FAQs
Why is this LED priced a little higher than market LED?
Because it uses pure copper wire. Many low-priced strings use iron wire that looks the same from outside. Copper gives even brightness on long runs, does not rust and can be reused every festival. One bunch covers about 20 feet, which is less than ₹5 per foot.
How can I check if an LED string has copper or iron wire?
Use the magnet test: hold a magnet to the wire. Iron wire sticks to the magnet; copper wire does not.
How much power does 1 bunch use?
About 6W per string (1 bunch). To choose an SMPS, multiply the number of strings by 6W and keep about 20% spare capacity.
Is it waterproof?
Yes. It is safe for building outlines, gates and outdoor Thoran decoration.
How many colours are available?
7 colours: Blue, White, Green, Warm White, Pink, Red and Yellow.
How many LEDs and how long is one bunch?
50 LEDs per bunch, about 20 feet, with 5-inch spacing.
Can I use it with a chaser?
Yes. It works perfectly with a 12V single-colour chaser for running and chasing effects.
Can I connect it directly to 220V?
No. These are 12V DC LEDs. Always use a 12V SMPS; connecting them to 220V mains will damage them.
Is this a pixel / WS2812 LED?
No. This is a 12V single-colour SMD LED, not a pixel/addressable LED.
What do I need for a DIY setup?
LED string + 12V chaser + 12V SMPS + ferrules + 2-pin connectors. Or choose our 12V Ready-Made Setup.