LED Strip 12V vs 24V — What's the Difference and Which Should You Choose?

Why Does Voltage Matter?

When shopping for LED strips, you will often see both 12V and 24V options. What is the difference? Which is better? This article explains everything in plain language — no electrical engineering degree required.

Voltage is the electrical pressure that drives the LED strip. A higher voltage means less current flows through the wire at the same power — which affects several practical factors we will cover below.

12V LED Strips

Advantages

1. Widely available — 12V is an older, established standard with easy-to-find accessories.
2. Shorter cut intervals — can be cut every 25 mm or 16.7 mm, allowing very precise lengths.
3. Slightly safer — lower voltage means less risk in the event of accidental contact.
4. Great for small installations — display cases, wardrobes, shelving units.

Disadvantages

1. Higher voltage drop — in runs longer than 5 metres, brightness noticeably fades towards the far end.
2. Higher current draw — at the same wattage, 12V draws twice the current of 24V, making wires run hotter.
3. Not suited for long runs — runs over 5 metres require additional feed points or multiple power supplies.

12V Products from ArumStores

• COB LED Strip 320C 12V — high-quality 12V COB strip
• Neon Flex 0612 12V — compact 12V neon flex
• ARUM Core Power Supply 12V — 12V transformer
• Arum Waterproof Power Supply 12V — 12V waterproof transformer

24V LED Strips

Advantages

1. Lower voltage drop — runs up to 10 metres with consistent brightness throughout.
2. Lower current draw — at the same wattage, current is half that of 12V, keeping wires cooler and safer.
3. Wider product range — most modern, high-density LED strips are 24V due to their technical advantages.
4. Better for large installations — wide rooms, long ceiling coves, staircases, and exterior runs.

Disadvantages

1. Longer cut intervals — minimum cut point is every 32 mm or more, slightly less precise than 12V.
2. Requires a dedicated 24V power supply — never mix with 12V equipment; doing so will immediately damage the strip.

24V Products from ArumStores

• COB LED Strip 480C 24V — most popular, even and bright
• COB LED Strip 528C 24V — a step up in brightness
• COB LED Strip 1280C 24V — maximum brightness, ultra-dense
• COB Strip Light RGBW 24V — colour-changing + white
• ARUM Hyper Switching Power Supply 24V — high-efficiency 24V PSU
• ARUM Core Power Supply 24V — standard 24V PSU

Side-by-Side Comparison

What Is Voltage Drop and Why Does It Matter?

Voltage drop is the phenomenon where voltage decreases along the strip as the run gets longer, causing the far end to appear dimmer than the start.

Think of water flowing through a pipe — the longer the pipe, the weaker the pressure at the far end. LED strips behave the same way.

How to reduce voltage drop:

1. Use 24V instead of 12V
2. Feed power from both ends of the strip (dual-end feeding)
3. Use thicker gauge wire (AWG Wire)
4. Split into shorter independent runs, each with its own power feed

Which Should You Choose?

Choose 12V if:

• Your run is short — under 3–5 metres
• You are installing inside cabinets, wardrobes, or small spaces
• You already own a 12V power supply
• You need very precise cut lengths

Choose 24V if:

• Your run is 5–10 metres or longer
• You are lighting a ceiling cove, staircase, or wide open area
• You need consistent brightness from start to finish
• You are starting fresh with no existing equipment (24V is the better default choice)

ArumStores’ Recommendation

We recommend 24V for the majority of installations because:

• Less voltage drop = more consistent brightness
• More product models to choose from
• It is the modern standard adopted by most manufacturers

Important Warnings

1. Never mix 12V and 24V — connecting a 12V strip to a 24V power supply will immediately destroy the strip.
2. Always match the voltage — check both the strip and power supply labels before connecting.
3. Add 20% headroom to your power supply — if your strip draws 48 W, use a power supply rated at least 60 W.

Unsure which voltage is right for your project? Contact the ArumStores team — we’ll calculate and advise for free!