In lighting design, attaining both ultra-slim profile and high optical efficiency has traditionally been seen as a conflicting challenge. Instead of depending on intuition, Luci adopted a methodical approach by using precise optical calculations and meticulous multi-layer construction to ensure tangible, measurable performance. At the heart of this innovation is the OptiFlow Array, a proprietary optical system developed entirely in-house. Encased within a space of less than 10mm in thickness, it effectively captures light and directs it precisely along an optimal path. This technological advancement removes previous physical constraints, establishing a new standard for performance in next-generation linear lighting solutions.
Real-world efficacy of 138 lm/W.
Extraordinary output achieved through an optical design of under 10mm.
In lighting design, a long-standing challenge has been the difference between the rated efficiency of fixtures and the actual light output in real-world applications. Specifically, in lens-based linear luminaires, much of the LED light gets scattered or absorbed inside the fixture, keeping the industry's typical effective efficiency around 100 lumens per watt (lm/W).
KIWA’s groundbreaking technology, OptiFlow Array, breaks through that limitation. With an optical thickness of only 10.0mm for the 25° lens and just 8.3mm for the 40° lens, its reflector captures nearly all the light produced by the LED and directs it to the lens at the perfect angle.
By minimizing optical losses at every stage, nearly all of the generated light is emitted into space. The result is an exceptional efficiency of 138 lm/W at the lens output, while still maintaining a high color rendering index (Ra94), which closely resembles natural sunlight.
This isn’t a measurement stated on the specification, but the actual amount of light that reaches the environment.
OptiFlow Array combines precise optical control with outstanding energy efficiency, all in a slim design that’s unlike anything previously available.
Rectify light to sharpen up the luminous space.
Achieving micrometer-scale precision within just 0.175mm
At the core of the visual excellence that KIWA provides is the ultra-slim microlens film embedded within the OptiFlow Array. Measuring only 0.175mm in thickness, this exceptionally fine film transforms the raw LED output and reshapes it into its ideal form. Through multiple cycles of diffusion and focus within the film itself, light is managed at the microscopic level — resulting in smooth, even luminance that designers aim to incorporate into their spaces.
The lens is crafted using advanced proprietary UV technology, shaping the lens geometry on high-grade polycarbonate with micrometer-level accuracy. Despite its extraordinary thinness, it offers outstanding beam control — and its adhesive-free design reflects Luci’s dedication to durability and environmental responsibility.
Hidden within a nearly invisible layer, this technology embodies a standard of zero compromise. Such precise engineering unlocks creative freedom and clarity across all design applications.
Eliminating the yellow ring — the unavoidable flaw of narrow-beam optics.
Four optical layers, constructed within a space of under 10mm.
When concentrating LED illumination through a lens, chromatic aberration—and the color fringing it produces—is an almost unavoidable issue. This phenomenon, often referred to as the yellow ring, becomes more noticeable as the beam angle narrows, creating a colored ring at the outer edge of the lit area. This visual distraction can introduce unwanted noise, diminishing the clarity and purity of the space.
OptiFlow Array resolves this technical challenge by layering four unique optical elements within a compact structure less than 10mm thick. Each layer serves a specific purpose, adjusting the balance between convergence and diffusion and guiding light particles through multiple controlled stages. Collectively, they work seamlessly to collimate and sharpen the beam with a level of precision that no single optical component can provide alone.
The outcome is a sharp 25° beam that maintains its focus while minimizing chromatic fringes—producing a clean, evenly distributed light across the surface. Through meticulous design and iterative refinement, the OptiFlow Array ensures the lighting quality that professionals value most: a stunning, pure field of illumination.
Multiple layers of engineering are packed into an ultra-thin profile. What the OptiFlow Array emits is a subtle, luminous gradient—rich in color fidelity, tranquil in appearance, and free from any visual disturbances.
High-output performance and close-proximity installation.
Proprietary thermal control and a continuous lens structure that liberates construction constraints.
High-power linear luminaires capable of washing walls with intense, far-reaching light have always demanded ample space for installation. Managing the heat produced by such high-output lights—by ensuring enough distance for dissipation—has been essential for safety and durability.
OptiFlow Array addresses this challenge directly. Its highly efficient optical system minimizes heat buildup at the source, keeping the fixture body cool even at maximum brightness. This enables close-proximity installation, allowing the fixture to fit into tight spaces that were previously unsuitable. In tight spaces where high-power lighting was once simply not an option, OptiFlow Array combines the ease of tape lighting installation with the performance and reach of a robust luminaire.
In addition to its thermal advantages, OptiFlow Array's rectangular, continuous lens design offers a notable aesthetic benefit. The scalloping effect common to round-lens luminaires — the half-moon patterns of uneven light distribution — is eliminated entirely. In reflective surfaces and high-gloss finishes, the LED point sources become virtually invisible, preventing the unwanted dot patterns that can detract from a refined design.
Offering adaptability for any setting and optical precision that enhances every material, the OptiFlow Array systematically eliminates the physical limitations that stand between a designer's vision and its realization.
Eliminating glare for extended illumination. Rigorous beam control that falls well below the UGR 16 threshold.
In professional lighting design, the elimination of glare is a matter of craft and integrity. No matter how beautifully a space is illuminated, the moment a light source becomes an intrusive presence — a source of discomfort rather than clarity — the quality of that design is compromised.
OptiFlow Array achieves a rare balance: it provides the necessary directionality to project light over distances while maintaining precise control that safeguards the human eye from discomfort. On the UGR scale, which measures glare annoyance, OptiFlow Array records below 10 with a 25° lens and below 10 with a 40° lens. Both results are well below the generally accepted threshold of UGR 16, the point at which glare becomes perceptible, indicating true glare-free performance rather than an approximation.
This level of control is especially valuable in challenging applications—such as direct lighting, downlights, and pendant fixtures—where the light source is within the occupant's line of sight.
A space filled with light, and a source that remains quietly invisible.
OptiFlow Array removes visual pollution from the equation, delivering the kind of still, restful luminous environment that humans instinctively recognize as comfortable.