Impressive facade lighting makes buildings visible in the urban space and enables orientation. There are different methods of illuminating a building depending on the type, for example office building, historical building, residential building or museum. The uniform illumination of facades serves to emphasise landmarks and gives them a calm presence in the urban space. Light accents on the other hand structure large surfaces and highlight architectural details such as columns and cornices. Grazing light wallwashing is ideal with facades for highlighting the fine textures of timber and natural stone to create striking reliefs. To avoid light pollution, good glare control and precise lighting technology are important factors when selecting facade luminaires. We give tips on how to strikingly illuminate facades in unison with the needs of both people and the environment.
With a wide arrangement of 1:1.25 we recommend wallwashers with a 48 watt LED module to uniformly illuminate a facade with a height of 12m from a distance of 4m with approx. 50lx.
Decisive factors for low-maintenance operation are maintenance of luminous flux and the failure rate of the LEDs. Comparing an ERCO high-performance LED (L90/B10) with a standard LED (L70/B50) demonstrates the positive effect of high-performance LEDs on investment costs. ERCO outdoor luminaires feature a failure rate of 0.1% of LEDs at up to 50,000h. This means that after just 20,000 operating hours, an approximately 10% higher luminous flux is generated with ERCO High-Power LEDs.
For a standard LED module with a failure rate of 0.2% of LED modules per 1,000h, with 50 luminaires installed, the failure of two luminaires after only 20,000h must be expected, whereas ERCO High-Power LEDs provide an unchanged light impression.