LED Modules: Types, Technical Parameters and Backlighting Applications

What are LED modules

LED modules are self-contained light sources consisting of one or more LEDs mounted on a PCB (printed circuit board). Each module contains an LED chip, a current-limiting resistor, and optionally a lens to direct the light beam. Modules are connected in chains via power cables and mounted using 3M self-adhesive tape.

Unlike LED strips, modules are point sources — each module emits light independently. This makes them the optimal solution for backlighting large surfaces (stretch ceilings, sign boxes) and three-dimensional objects (3D letters, signage), where a linear strip cannot provide even light distribution.

LED module types from 2K-Trade

The 2K-Trade LED modules catalogue includes six series differing in power, beam angle, and colour temperature.

MINI lens modules

MINI LED modules are the smallest in the range, designed for backlighting thin sign boxes and small surfaces. Parameters:

• Power: 0.36-1.0 W per module
• Beam angle: 170 degrees (with diffusing lens)
• Voltage: 24V DC
• Colour temperature: 3000 K, 4000 K, 6000 K
• Application: thin sign boxes (up to 80 mm depth), small 3D letters

HIGH EFFICIENCY modules

HIGH EFFICIENCY LED modules deliver high luminous flux at low energy consumption. Suited for applications requiring intense backlighting:

• Power: 1.0-1.5 W per module
• Beam angle: 160 degrees
• Efficiency: over 130 lm/W
• Voltage: 24V DC
• Application: stretch ceiling light boxes, large sign boxes

POWER modules

POWER LED modules are the highest-output series, designed for backlighting large surfaces from a distance:

• Power: 2.0-3.0 W per module
• Beam angle: 15-60 degrees (directional lens)
• Voltage: 24V DC
• Application: high-clearance stretch ceilings (over 200 mm), backlit facades, advertising pylons

UNI CCT modules

UNI CCT LED modules offer tuneable colour temperature in the 2700-6500 K range via a CCT controller. Each module contains two LED types (warm and cool), enabling smooth colour temperature transitions:

• Power: 1.5 W per module
• CCT range: 2700-6500 K
• Voltage: 24V DC
• Application: stretch ceilings in mood-lit rooms, hotel receptions, restaurants

RGB and RGBW modules

RGB Lens and RGBW Chip modules produce full-spectrum colour light. RGBW modules include an additional white LED, enabling colour mixing with white light:

• Power: 1.0-2.0 W per module
• Colours: red, green, blue + white (RGBW)
• Voltage: 24V DC
• Control: RGB or RGBW controller with remote, Wi-Fi, or Zigbee
• Application: decorative stretch ceilings, backlit wall panels, event staging

LED module series comparison

Applications

Stretch ceiling backlighting

LED modules are the primary light source for light-box stretch ceilings. They mount on the ceiling slab at even spacing (typically 50-100 mm) and light passes through a translucent membrane. Lens modules ensure even light distribution across the entire ceiling surface, eliminating visible hot spots.

For standard-depth backlighting (100-200 mm), use HIGH EFFICIENCY modules. For greater membrane-to-slab distances (over 200 mm), use POWER modules with directional lenses.

Sign boxes and signage

LED modules are the industry standard for backlighting light boxes, signs, and 3D letters. Directional lenses enable even backlighting even at shallow box depths (40-80 mm). IP65-rated modules (available in some series) can be used for outdoor installations.

Furniture and architectural backlighting

LED modules are used for backlighting furniture recesses, curved installations, and architectural elements where LED strips cannot deliver even results. Point-source mounting allows custom light distribution matched to the shape of the backlit object.

Installation guidelines

Correct LED module installation requires the following rules:

• Module spacing — depends on lens beam angle and backlighting depth. For stretch ceilings at 150 mm depth with 160-degree lens modules: 80-100 mm spacing.
• Mounting surface — modules mount on flat, clean surfaces using 3M self-adhesive tape. The surface must be degreased.
• Power supply — modules operate on 24V DC. Calculate supply wattage: (number of modules) x (module power) x 1.2 (20% headroom).
• Maximum chain length — each series has a defined maximum number of modules per chain (typically 20-40 pcs). Exceeding this causes brightness drop at the chain end.
• Connections — modules connect in series via power cables. Soldered or crimped joints must be insulated with heat-shrink tubing.

LED modules vs LED strips: when to use which

In many projects, modules and strips are used together: modules on the ceiling plane (light-box backlighting) and strips in LED profiles around the room perimeter (light line).

System components for LED modules

A complete LED module backlighting system consists of:

• LED modules — appropriate series and quantity.
• 24V DC LED power supply — wattage matched to total module load + 20% headroom.
• Controller — required for CCT, RGB, and RGBW modules. MONO controllers enable dimming of single-colour modules.
• Remote or wall panel — for adjusting brightness, colour, or colour temperature.

Frequently asked questions

How many LED modules per square metre for a stretch ceiling?

For standard light-box backlighting at 150 mm depth: 80-120 modules per square metre (80-100 mm spacing in both directions). At greater depth (over 200 mm), density can be reduced to 40-60 modules/sq m using POWER modules with directional lenses.

Can LED modules be dimmed?

Yes, all 24V LED modules can be dimmed using PWM controllers. MONO controllers adjust brightness of single-colour modules, CCT controllers tune colour temperature of UNI CCT modules, and RGB/RGBW controllers manage colour on colour modules.

What is the lifespan of LED modules?

Rated lifespan is 30,000-50,000 hours. At continuous 24/7 operation, that is 3.4-5.7 years. At typical usage (8-12 hours/day), modules last 7-17 years. Mounting on a metal surface (e.g. ceiling sheet metal) extends lifespan through better heat dissipation.

Are LED modules suitable for outdoor use?

Modules rated IP65 or higher are moisture-resistant and can be used outdoors. For indoor applications (stretch ceilings, sign boxes in dry rooms), IP20 modules are sufficient. Check the IP rating in the product data sheet for each series.

How to size a power supply for LED modules?

Calculate: (number of modules) x (module wattage) x 1.2. Example: 200 HIGH EFFICIENCY modules x 1.2 W x 1.2 = 288 W. Choose a supply rated at least 300 W with 24V DC output. 2K-Trade stocks Mean Well power supplies from 20 W to 600 W.

2K-Trade LED module range

The complete LED modules catalogue includes six product series in various power, colour temperature, and IP rating options. All modules operate on 24V DC and carry CE certification. B2B orders are fulfilled from the Lodz warehouse. Contact us for a project quote.