The choice of suitable lighting depends crucially on the demands a room places on light. LED lights are characterized by enormous technological flexibility. To unleash the full potential of your lighting concept, you should be familiar with the most important characteristics of LEDs and precisely tailor them to their intended use.

1. The Core Properties of Modern LED Technology

Luminous Flux (Lumen) instead of Power Consumption

While wattage used to be the measure of brightness, today, luminous flux in lumens (lm) is the decisive property. It indicates how much light a luminaire actually emits in all directions.

• Targeted Use: For comfortable general lighting in the living room or bedroom, approximately 100 to 150 lumens per square meter are calculated. In work areas like the kitchen or home office, where concentration is key, 250 to 300 lumens per square meter are ideal. Powerful high bay lights or floodlights for outdoor areas often range in several thousand lumens to illuminate large areas according to standards.

Color Temperature (Kelvin) for the Right Mood

The light color significantly influences our mood and performance. It is measured in Kelvin (K) and is divided into three main areas:

• Warm White (2,700 to 3,000 K): This light has a calming and cozy effect. It is perfect for floor lamps in the reading corner, table lamps on the bedside table, or decorative wall lights in the living room.
• Neutral White (4,000 K): An objective, contrast-enhancing light. It is the ideal choice for bathroom lights to wake up in the morning, for under-cabinet lights above the kitchen countertop, and for panels in office spaces.
• Daylight White (> 5,300 K): This light has a high blue component and promotes concentration. It is primarily used in technical and commercial areas, for example, for damp-proof lights in the workshop or for industrial high bay lights.

Color Rendering Index (CRI / Ra)

The color rendering index indicates how naturally colors appear in LED light. A value of Ra > 80 is considered standard in residential areas. Wherever colors need to be judged absolutely undistorted – such as in front of the mirror in the bathroom (supported by high-quality bathroom lights) or in fashion presentations – you should look for a CRI of Ra > 90.

Beam Angle for Light Control

The beam angle determines how wide or focused the light is emitted into the room:

• Wide Beam (e.g., 120°): Large-area panels and flat ceiling lights distribute light evenly and prevent harsh shadows. Optimal for general room illumination.
• Narrow Beam (e.g., 24° to 40°): Recessed spotlights or flexibly adjustable surface-mounted lights bundle the light to specifically emphasize architectural details, pictures, or work surfaces.
  

2. The Three-Layer Lighting Concept: Where Each Luminaire Shines

A professional lighting concept thrives on the combination of different types of luminaires. Experts divide light into three layers:

Layer 1: Ambient Lighting

It provides general orientation in the room and softens harsh contrasts. Large-area systems such as ceiling lights and panels are used here. Supplemented by wall lights that emit their light indirectly via the wall, a soft, glare-free foundation is created. In hallways and transition areas, discreet surface-mounted lights or recessed spotlights with a wide beam angle are often sufficient.

Layer 2: Task Lighting

Where work, reading, or cooking is done, ambient lighting is not enough. Here, light is functionally bundled. Under-cabinet lights under the wall cabinets illuminate the worktop without shadows. On the desk, ergonomic table lamps provide glare-free light on documents, while recessed spotlights in the ceiling define the dining or coffee table as a visual zone.

Layer 3: Accent Lighting

This layer gives the room depth and character. Floor lamps can enliven dark corners of a room, while adjustable surface-mounted lights specifically illuminate art objects. Outdoors, floodlights take on this task by illuminating facades or garden structures.

3. Special Requirements: Protection Classes and Industrial Suitability

Not every LED luminaire can be installed everywhere. The ambient conditions significantly determine the required mechanical properties:

• Moisture and Wetness: In the bathroom and in harsh environments such as garages or basements, the housing is exposed to water vapor and splashing water. Bathroom lights in the direct vicinity of showers and bathtubs require at least protection class IP44. For dusty and wet rooms, robust damp-proof lights (often IP65) are absolutely necessary to prevent short circuits.
• Mechanical Stress and Height: In the industrial sector, luminaires must withstand vibrations, heat, and extreme operating times. High-performance high bay lights offer optimized thermal management systems made of die-cast aluminum, which efficiently dissipate the heat of the LEDs and thus keep the light output constant for decades.

Use these technical properties specifically to create the perfect balance of function and atmosphere for every living, working, and outdoor area.