Installing under-cabinet lighting transforms kitchen functionality and ambiance, with LED options offering energy efficiency and customizable brightness. The process ranges from simple plug-in solutions to permanent hardwired installations, depending on your technical comfort and desired outcome. Key considerations include selecting the right lighting type (LED, fluorescent, or xenon), planning the wiring route, and ensuring proper electrical connections. Most projects take 2-3 hours with basic tools, though hardwired systems may require additional electrical work like installing junction boxes or dimmer switches.

• Three primary installation methods: Plug-in (simplest), hardwired (most permanent), or wireless switch-controlled ^[1]
• Recommended materials: LED light strips, aluminum profile tracks, low-voltage wire, and dimmer switches for adjustable brightness ^[3]
• Cost and time: Estimated $100-$125 and 2-3 hours for DIY installation ^[4]
• Safety first: Always turn off power at the circuit breaker before beginning electrical work ^[4]

Under-Cabinet Lighting Installation Guide

Choosing the Right Lighting System

The first step in installation is selecting the appropriate lighting system for your needs and skill level. LED lights are the most recommended due to their 50,000+ hour lifespan, energy efficiency, and low heat output compared to halogen or xenon alternatives ^[4]. The installation approach depends on whether you choose plug-in, hardwired, or battery-powered options, each with distinct requirements.

For plug-in systems:

• Use LED light bars with built-in transformers that plug directly into existing outlets
• Ideal for renters or those wanting minimal electrical work
• Can be installed in under 30 minutes with no permanent modifications ^[1]
• Requires strategic placement near power sources or using extension cords

Hardwired systems offer permanent solutions:

• Requires running 14/2 or 12/2 Romex wiring from a junction box ^[7]
• Can be connected to existing circuits or new dedicated circuits
• Allows for dimmer switch integration for adjustable brightness ^[3]
• Typically uses low-voltage transformers for LED strip lights ^[6]

Key material considerations:

• LED light strips: Available in warm white (2700K-3000K) or cool white (4000K-5000K) color temperatures ^[1]
• Aluminum profile tracks: Provide diffusion and protect LED strips from dust ^[3]
• Dimmer switches: Require compatible LED drivers for smooth dimming ^[4]
• Wire connectors: Use Wago lever nuts or wire nuts for secure connections ^[7]

Step-by-Step Installation Process

Begin by turning off power at the circuit breaker and verifying it's off using a voltage tester ^[4]. For hardwired installations, plan your wiring route by measuring the distance from your power source to each lighting location. Most professionals recommend drilling access holes in cabinet backs where wires will enter, ensuring no exposed wiring remains visible ^[9].

Preparation steps:

• Measure and mark light fixture positions under cabinets
• Drill 3/4" holes in cabinet backs for wire access ^[8]
• Install junction boxes if extending existing circuits ^[7]
• Run 14/2 Romex from power source to first fixture location ^[6]

Wiring and connection:

• For low-voltage systems, connect transformer to 120V power source first
• Run low-voltage wiring (typically 18-22 gauge) between fixtures ^[3]
• Use wire connectors to join fixture wires to power supply ^[7]
• Secure all connections within junction boxes per electrical code ^[6]

Fixture installation:

• Mount LED strips into aluminum channels for diffusion ^[3]
• Attach fixtures using provided mounting hardware
• Connect each fixture in series using provided connectors
• For plug-in systems, route cords along cabinet backs using cable clips ^[1]

Final connections and testing:

• Connect to dimmer switch if using (ensure LED-compatible model) ^[4]
• Install switch plate and secure all fixtures
• Turn power back on and test each light
• Adjust fixture positions for even light distribution ^[3]

Professional tips for clean installation:

• Hide wiring by drilling holes directly behind where fixtures mount ^[9]
• Use adhesive-backed cable clips to secure low-voltage wiring ^[3]
• Consider installing outlets below cabinets for future flexibility ^[6]
• Test all connections with a multimeter before finalizing installation ^[7]