Light Tube – Smart alternative for Day light harvesting

Lighting load is significant for residential, commercial or industrial building or spaces. Windows enlarging and providing light passage for reducing day time lighting load is the best technique for solar light harvesting, while this option is suitable for only walls exposed to solar light and controlling lighting is also difficult. To solve this problem light …

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Lumen is not just enough, S/P ratio – for lighting selection.

When selecting lighting for any industrial or commercial application we generally compare lumen and make selection based on lumen requirement. Selecting lighting based on lumen is partially correct but not enough when we are comparing lighting from different source such as LED, High pressure sodium vapour, High pressure mercury vapour, Metal Halide, CFL or any …

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Luminous performance of common light fittings

Type of Lamp Lumen/watt Range Lumen/watt Avg Color rendering index Typical application Typical hours Incandescent 8-18 14 Excellent(100) General Lighting (Homes, restaurants, etc) 1000 Florescent lamps 46-60 50 Good w.r.t coating(67-77) Offices, shops, hospital, homes 5000 Compact florescent lamps(CFL) 40-70 60 Very good (85) Hotel, shops ,hospital, homes 8000-10000 High pressure mercury(HPMV) 44-57 50 Fair(45) …

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