Surface mounted downlight IKU

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Overview
Iku is a family of surface-mounted ceiling downlights designed to provide differentiated architectural lighting where recessed installation is not possible or for economical refurbishment of existing buildings. Surface mounting enables quick installation while preserving high visual comfort and a neutral, compact shape.

Key features

• Tunable white (2700 K – 6500 K) for adaptive lighting concepts.
• High luminous efficacy: >120 lm/W (typical).
• High visual comfort: UGR < 19 in office-oriented versions.

Sizes and luminous flux

• Size 4 — Diameter 136 mm: luminaire flux 615 – 2,714 lm; connected load (representative) 6.9 W – 21.4 W.
• Size 5 — Diameter 172 mm: luminaire flux 1,182 – 4,625 lm; connected load (representative) 12 W – 34.4 W.
• Size 7 — Diameter 212 mm: luminaire flux 1,974 – 6,192 lm; connected load (representative) 19.6 W – 44.7 W.

Light distributions / application types

• Surface-mounted downlight — rotationally symmetrical wide beam for general lighting.
• Oval wide flood — efficient axial distribution for corridors and transit routes with wide luminaire spacing.
• Oval flood — axially symmetrical distribution for linear lighting concepts.
• Extra wide flood / wide flood variants available to meet different ambient requirements.

Applications and advantages

• Suitable for new build and refurbishment projects where recessed mounting is not feasible (solid ceilings, concrete slabs).
• Offers homogeneous light output and good glare control for office and circulation areas.
• Quick surface mounting reduces installation time and cost in modernization projects.

Technical characteristics / specifications

• Brand: ERCO.
• Model: Iku.
• Mounting: Surface-mounted ceiling luminaire for solid ceilings and refurbishment.
• Tunable white: 2700 K – 6500 K (supports Human Centric Lighting concepts).
• Efficiency: >120 lm/W (family typical).
• UGR: < 19 for office-appropriate versions.
• Lumen packages: approx. 615 lm up to 6,192 lm depending on size and light source variant.
• Service life target: designed and tested for long-term operation (approx. 75,000 hours; eco-design target min. 20 years).
• Luminaire spacing guideline: for uniform general lighting d ≤ 1.5 × h (h = mounting height above working plane); wall offset approx. d/2.
• Available sizes (diameter): 136 mm (Size 4), 172 mm (Size 5), 212 mm (Size 7).