Equipping a TV Lowboard with Indirect LED Lighting: Strips, Controllers & Power Supplies

December 17, 2025

Indirect lighting for a TV lowboard requires the precise coordination of LED strips, operating voltage, controllers, and a suitably dimensioned power supply.

Integrating light into furniture construction goes far beyond simply attaching a light source. Particularly with wide carcass units such as a TV lowboard, which often measures from 140 cm to over 250 cm in modern living rooms, fitters and ambitious DIYers must plan electrotechnical parameters carefully. Clean illumination without visible light spots, flicker-free operation, and the concealed routing of components require a technical understanding when selecting furniture lighting. This guide walks you through the strict specifications that are decisive when planning indirect illumination for low media furniture.

Key Purchasing Criteria for Furniture Lighting

When equipping a lowboard with light strips, the hardware determines both the longevity and the visual quality of the installation. The following technical parameters must be taken into account.

Operating Voltage: 12 V or 24 V

LED strips for furniture construction typically operate on low voltage. The choice between 12 V and 24 V depends directly on the length of the planned lighting run. For a compact lowboard that is 140 cm wide, for example, a 12 V system is entirely sufficient. However, if the light strip is routed around the entire piece of furniture, the length quickly adds up. For runs over 500 cm, a measurable voltage drop occurs in 12 V systems. This means that the light-emitting diodes at the end of the strip glow visibly dimmer than at the power feed point. For large-format media units, such as a lowboard measuring 240 cm or 250 cm in width where the lighting is installed around the entire perimeter, a 24 V system is mandatory to guarantee uniform brightness over the entire distance.

LED Density and Technology: SMD vs. COB

The type of integrated diodes dictates the light output pattern. Traditional SMD (Surface Mounted Device) strips feature visible individual LEDs. If the strip is exposed or if the light reflects onto a glossy floor, distracting light dots appear. The solution to this is COB (Chip on Board) technology. In this design, the strip is coated with a continuous phosphor layer. The result is an entirely homogeneous, seamless band of light without visible individual dots. For indirect plinth lighting on a TV lowboard, COB is today's technical standard.

Power Supply Sizing

The power supply unit acts as the heart of the system, keeping the electrical circuit running steadily like a pump. The output of the power supply is specified in Watts (W) and must be matched precisely to the power consumption of the LED strip. The calculation method is straightforward: power consumption of the strip per metre multiplied by the total length in metres. A power reserve of 20% must always be added to this value to protect the power supply from overheating and premature wear.

Overview of Types and Options

The control method and the light colour must be adapted to the surrounding environment and the use of the room.

Light Colours and Colour Temperature

Warm white (approx. 2700 K - 3000 K): Ideal for living areas, creates a cosy atmosphere.
Neutral white (approx. 4000 K): Functional light, often used when the lowboard has a white or light grey finish, as it does not distort the furniture colour.
CCT (Correlated Colour Temperature): Allows continuous adjustment of the colour temperature between cool white and warm white.
RGBW: Combines coloured light with a dedicated white chip for maximum flexibility.

Controllers and Control Options

The controller is connected between the power supply and the LED strip. It regulates brightness (dimming) and, with CCT/RGBW strips, the colour. Control is typically handled via radio frequency (RF), infrared (IR), or smart home protocols such as Zigbee. Crucial for furniture construction: RF controllers do not require line of sight and can be installed out of view behind the back panel or inside the carcass.

Which Setup for Which Scenario?

The design of the furniture dictates the choice of components.

Scenario 1: The compact, floor-standing TV lowboard (up to 140 cm wide) When the unit stands on the floor and only the bottom edge is to be illuminated, a simple 12 V strip in warm white is sufficient. The power supply remains compact here and can often be hidden directly inside the cabinet carcass. If the unit stands on feet, adjustable furniture legs facilitate precise levelling so that the light gap to the floor runs completely parallel.

Scenario 2: The floating XXL lowboard (240 cm to 250 cm) If a very long lowboard is wall-mounted, the lighting often serves as an architectural feature (top and bottom). Here, 5 to 6 metres of LED strip accumulate rapidly. In this case, choosing a 24 V system with COB strips is essential. The power supply requires a higher wattage rating and correspondingly more space for heat dissipation. It should be placed behind an inspection flap or in a well-ventilated compartment.

Scenario 3: Handleless media furniture with drop-down flaps Modern TV lowboards often omit handles. If lighting is mounted inside the compartments, a door contact switch is recommended. When opening the flap, the light switches on. To protect the mechanism of heavy MDF flaps, using high-quality door dampers is advisable. If handles are used after all, they should not disrupt the lighting concept – low-profile chrome furniture handles reflect the light subtly.

Installation Notes for Furniture Assembly

Professional fitting requires precision and the right materials.

Ensure heat dissipation: Even though LED strips do not become extremely hot, accumulated heat drastically reduces their lifespan. Strips should never be stuck directly onto coated chipboard. Using slim aluminium profiles ensures the necessary cooling and protects the electronics from dust.
Plan cable pass-throughs: The cable running from the LED strip to the controller must be routed into the carcass invisibly. For this purpose, a hole (usually 8 mm) is drilled into the back panel or the bottom base.
Secure components: Power supplies and controllers have a certain weight. They must not hang solely by their cables. For secure fixing inside the unit, use suitable wood screws and furniture screws (e.g. panhead screws 3.5 x 16 mm) to screw the housings directly to the chipboard.
Observe cable cross-sections: When extending cables between the power supply and controller, or between the controller and LED strip, the conductor cross-section must be correct. At 24 V and typical lengths in furniture building, 0.5 mm² to 0.75 mm² is usually sufficient.

FAQ – Frequently Asked Questions About Lowboard Lighting

How do I calculate the correct power supply for my lowboard? Multiply the power rating of the LED strip per metre by the total installed length. You must add a 20% safety margin to this result. Example: 3 metres of strip at 10 W/m = 30 W. Adding 20% (6 W) means you need a power supply with at least 36 W.

Why does the LED strip shine dimmer at the end? This phenomenon is known as voltage drop and typically occurs with 12 V systems from a length of 5 metres upwards. The solution is either using a 24 V system or feeding power into the strip from both ends.

Do I definitely need an aluminium profile? An aluminium profile is strongly recommended for a permanent installation. It acts as a heat sink. Without this heat dissipation, the light-emitting diodes age faster, lose luminous output, and the adhesive tape on the back may detach from the chipboard due to heat build-up.

Can LED strips be cut to length? Yes, LED strips feature marked cutting points (usually every 25 mm to 50 mm, depending on diode density and voltage). The cut must be made accurately using scissors across the copper contact pads.

Which adhesive sticks to melamine-faced chipboard? The factory-applied 3M adhesive tapes on the back of aluminium profiles or LED strips adhere very well to clean, grease-free decorative chipboard. Before mounting, the surface must be wiped clean with isopropanol or a similar degreasing agent.

Matching Products & Categories for Your Project

To implement the lighting project on your TV lowboard with technical precision, you will find the relevant components and mounting hardware in the following categories: