Facade Lighting Design

Selection depends on four parameters: facade finish (flat polish complements wall washing, rough or clinker bricks require grazing), projection distance (ground-mount-lighting needs narrow beam angles for tall walls, low-mount linear systems suffice for low-rise buildings), control system (automated static white for historical architecture; programmable DMX512 RGBW for commercial architecture), and environment (minimum waterproofing IP65 for open-air, protected environments, IP67 for ground tables or windy locations). When uncertainty remains, a test-fit mockup on the actual structure helps solidify the design choice on site.

Wall washing has fixtures placed at a distance equal to approximately 1/3 of the face height resulting in uniform, shadow-free light that makes textures, cracks and joints “disappear”, making the surface appears two-dimensional and flat. Wall grazing has fixtures suspended from the surface at 150 300mm or less at an oblique position resulting in typical, conspicuous three dimensional shadows at all facets and textures on the surface. Select washing for glass, smooth render, and corrugated metal panel situations. Select grazing for brick, stone, board-formed concrete, or any other situations where the three-dimensional surface character is part of the design and aesthetic.

Using a regular commercial grade LED fixtures in an unadjusted static white cycle with wall washing application is about $15-40 per m2 installed (only for fixtures) Dynamic RGBW systems with DMX512 controls can range in cost from about $40-120 per m2, depending on pixel density and complexity of programming. Total project including design, wiring, power supplies, controllers and install labor costs varies from about 40 60% above this number. For a 1000 m2 commercial podium with mixed static and dynamic zones, the total installed project cost generally falls in the 30,000 120,000 range +- depending greatly on the level of fixture tier used and complexity of the install.

For wall-mounted fixtures: IP65 minimum. Ground-recessed uplights: IP67 or IP68. Coasts: IP66 with a marine-grade corrosion treatment. Our entire application focused range has an IP65 minimum as a baseline, with IP67 silicone-filled options for in-ground, full siting and harsh-environment applications.

Yes. DMX512 for dynamic RGB and RGBW fixtures and DALI for static or tunable white backlit surfaces and BMS integration work together well in a single project. We can wire both control network into our fixtures, along with 0-10V for additional control functionality.

Optics is on the fore-front of the engine- we use asymmetric reflectors with as low as possible BUG rating to reflect output onto the face itself instead of into the sky. We specify pixelated fixtures with high color-rendering and match them to astronomical clock controllers which dim 50-70% after midnight. We fence off all upward-facing fixtures so beam-trace stops at the roofline. But beyond hardware selection, discipline in design matters: don’t over-light the facade, always adhere to IDA and IES dark-sky standards and verifiy local ordinance compliance… some cities have recently mandated relative upward light ratios with cut-off aftercurfew, and if not followed, fixtures must be relocated. We always include light trespass calculations and BUG ratings on every project to avoid any surprises.

Warm white (2700-3000K) is recommended to render the warm hues of natural stone, brick and wood. Neutral white (4000K) is recommended for modern, glass and steel architectures. Cool white (5000-6000K) are recommended strictly for industrial and high-security, utilitarian presentation settings. For unification and maximum flexibility: specify tunable-white (2700-6500K adjustable range) fixtures.

Expect 50,000-80,000 hours at L80 from those quality LED facade fixtures – that 12-15 years of nightly operation before they should be replaced. Metal halide: 6,000-15,000 hours, meaning re-lamp every 2-3 years. HPS hits 12,000-24,000 hours. On a multi-story building, each re-lamping cycle every 2-3 years includes rental of scaffolding or aerial lift, labor for maintenance, and at-height downtime. LED removes 4-6 of those costly at height service events over the useful life. It’s those cost advantages that really compound over and above just the energy savings. Existing installations from many of our earliest production years are still operating at original fixture and ballast levels with a validated lumen depreciation well within L80 specifications.

Ongoing innovations are IoT-enabled facades with cloud-enabled content management interfaces, human-oriented day/night tunable-white lighting that update color temperature during the nighttime hours, high density LED media floors for creative content display and responsive urban artworks, dark-sky compliant designs with indefinite curfew dimming, integration with building energy management systems for automated utility-power demand response, sensor-based interactive luminaires responding to pedestrian traffic for example and to environmental conditions. The technology trend drivers are: convergence- facade lighting is adopting the same IP platforms that are now used for HVAC controls, security and access management.