Exterior Lighting Renovation of Istiqlal Mosque, Jakarta Indonesia
Project Overview
Located on the north side of Merdeka Square in central Jakarta, Istiqlal Mosque is the largest mosque in Southeast Asia and one of Indonesia’s most important national landmarks, distinguished by huge white domes, multiple minarets and large stone facades decorated with geometric patterns. This lighting retrofit covers mosque facades, dome bases, lower sections of minarets, together with surrounding public plaza and pedestrian paths. Old luminaires suffered severe aging, creating patchy brightness on building surfaces and insufficient illumination for walkways, bringing safety risks for night‑time visitors.
Renovation scope includes 43,000 ㎡ of surrounding plaza and 1,610 linear meters of peripheral walkways. Linear wall‑washers provide even illumination across main facades to highlight geometric stone carvings. High‑power floodlights cast upward beams for dome rims and minaret bodies. Bollard lights supplement functional lighting for plazas and walkways. Uniform static warm‑white lighting is adopted with no colorful or dynamic effects to match the solemn religious character.
Local Environmental Conditions
Jakarta features equatorial tropical rainforest climate with year‑round high temperature and humidity, average temperature 27‑30℃ and relative humidity constantly above 75%. Heavy concentrated rainfall takes place from November to March. As a coastal city, salt‑laden moisture in the air causes continuous corrosion to metal housings and electric components, so wall‑washers and floodlights demand high‑grade waterproof, dust‑proof and anti‑salt‑spray performance. As a famous national cultural landmark, the plaza receives around 2,100 visitors per day, with sharp surges on weekends and religious festivals, requiring long‑term stable luminaire operation.
Project Objectives
- Lift average illuminance of plaza and walkways from pre‑retrofit 9‑14 lux to target 23‑27 lux for visitor night‑time safety.
- Maintain illuminance uniformity ≥0.70 for main plaza zones to eliminate hot spots and dark patches.
- Deploy linear wall‑washers for even facade illumination; use floodlights to accentuate dome rims and minarets. Apply static warm‑white light only, avoid colored or dynamic lighting to preserve solemn religious atmosphere.
- Wall‑washers and floodlights shall withstand high‑humidity, salt‑spray coastal conditions; overall annual luminaire failure rate ≤3%.
- Reduce overall maintenance workload by 60%‑63% versus pre‑retrofit baseline.
- Meet lighting demand for around 2,100 daily visitors and staff.
