Light and Effect: How Facade Colors React to Different Sun Exposure

Color is Not Just Color

Anyone who has experienced how differently a wall color appears in morning, midday, and evening light knows: color is relative. What looked perfect in the store can become an unpleasant surprise on the facade.

The Light Reflectance Value (LRV) Explained

The Light Reflectance Value indicates how much light a color surface reflects. It is measured on a scale from 0 (black) to 100 (white) and is the most important technical parameter in facade consultation.

Why is the LRV So Important?

LRV below 20: Very dark colors. High heat absorption, risk of stress cracks in the render. Only conditionally suitable for facades.

LRV 20–40: Strong color tones. Possible, but to be used with caution on external thermal insulation composite systems (ETICS).

LRV above 40: Recommended for most facades. Good balance between color effect and technical safety.

How Different Times of Day Change Color Perception

Morning (soft, warm light): Colors appear warmer and softer. Blue tones can look greenish.

Midday (harsh, white light): The most intense color representation. Colors appear in their "purest" form.

Evening (golden light): Warm tones become more intense, cool tones lose their vibrancy.

Overcast (diffuse light): Colors appear more muted and subdued.

Digital Light Simulation as a Solution

Modern color visualization allows for simulating different lighting situations on screen. This way, the client can compare the color effect at various times of day before making a decision.

Conclusion

Consultation on Light Reflectance Value and light effects is a sign of professional expertise. Painting companies that combine this knowledge with digital visualization immediately impress clients.