Solar tube LIGHTPIPE®

Overview
Lightpipe® is a patented tubular daylighting device designed to capture and transmit natural sunlight into interior spaces via high-reflectivity conduits and diffusers. The system reduces artificial lighting needs during daylight hours and is suitable for industrial, commercial and infrastructure projects.

How it works
Sunlight is collected by roof- or wall-mounted collectors (active or passive). The captured light is channelled through a reflective tubular conduit that can include bends to reach target areas. A diffuser at the terminus distributes daylight evenly into the space. High-reflectivity surfaces and optimized collectors enable transmission over long distances, supplementing or replacing electric lighting.

Applications

• Pharmaceutical and clean-room facilities
• Offices and production workspaces
• Warehouses and logistics halls
• Religious and public buildings
• Retail spaces and supermarkets
• Greenhouses and horticulture facilities
• Airports, metro stations and railway terminals

Types

• Roof-mounted Lightpipe — collectors on the roof; vertical conduits deliver daylight to interior levels, with bends as required.
• Wall-mounted Lightpipe — collectors on exterior walls; horizontal conduits deliver daylight where roof access is limited.

Lightpipe Features

• High transmission of natural light using reflective tubular conduits
• Design optimized for long service life and low maintenance
• Heat and UV protection to limit undesirable solar gain
• Leak-proof installation details
• Reduces artificial lighting demand and related energy consumption
• Even interior daylight distribution via engineered diffusers
• Available in roof-mounted and wall-mounted configurations

Use cases & selected project impacts
Indian Railways (example project):
Total area covered: 120,760 sq ft
Number of Lightpipes installed: 1,506 (750 mm)
Energy savings: 1,789,000 units per year (approx.)
Payback period: 3 years
Return on investment: 40%

Avra Laboratories (example project):
Total area covered: 363,129 sq ft
Number of Lightpipes installed: 600
Energy savings: up to 70% reported
Payback period: ~20 months
Return on investment: 58%

Project indicators
Years of experience: 20+
Daylight systems executed: 1,189+ projects reported
Aggregate area covered: hundreds of thousands of m² (company-reported)
Product innovations: patented Lightpipe® technology

Installation steps (process)

• Requirements listing and specification
• Site visit and daylight assessment
• Budget-friendly quotation and proposal
• Installation and commissioning
• Post-installation service and maintenance support

Benefits

• Significant reduction of artificial lighting consumption during daytime
• Improved interior illumination and occupant comfort
• Lower operational energy costs and reduced carbon emissions
• Scalable solution for commercial, industrial and infrastructure projects

Technical specifications

• Product type: Tubular Daylighting Device (TDD) / Lightpipe®
• Components: Sunlight collector (active/passive), high-reflectivity tubular conduit, diffuser
• Mounting: Roof-mounted or wall-mounted collectors; conduits with bends to suit layout
• Material/surface: High-reflectivity interior surface to minimize light loss
• Performance: Engineered to transmit natural light over long distances; reported daytime energy savings up to 80%
• Protection: Integrated measures for heat and UV control and leak-proof installation
• Applications: Industrial, pharmaceutical, commercial, public infrastructure, retail, greenhouse
• Notable metrics: Large-scale installations with documented energy savings and payback periods