Choosing Between 12V and 24V LED Strip Light

Voltage Drop and Run Length

Voltage drop occurs when the electrical resistance in the strip reduces the voltage reaching the far end. This causes dimming or colour shift in the last section of the strip.

For 12V strips, voltage drop becomes noticeable beyond 5 meters in high-density configurations. For 24V strips, the same issue appears beyond 10 meters under similar conditions.

When to Choose 12V

12V strips are suitable for short runs under 5 meters, especially in low-power applications such as under-cabinet lighting, display cases, or accent lighting in tight spaces.

They are compatible with standard low-voltage power supplies and dimmers commonly used in residential and small commercial installations.

When to Choose 24V

24V strips are recommended for runs over 5 meters, particularly in commercial or architectural applications such as cove lighting, signage, or large retail displays.

The higher voltage reduces current for the same power, minimizing voltage drop and allowing longer continuous runs without visible dimming.

Driver and Power Supply Compatibility

12V strips require drivers with output matching the strip’s input voltage and sufficient current capacity. Standard 12V drivers are widely available and cost-effective.

24V strips require 24V drivers. These are common in commercial lighting but less common in consumer-grade setups. Ensure the driver supports the strip’s total power draw.

Power Consumption and Current Draw

For the same number of LEDs, 12V strips draw twice the current of 24V strips at the same power. This affects wire gauge and connector sizing.

Higher current in 12V systems increases resistive losses and requires thicker wiring or shorter runs to maintain performance.