Indirect Lighting & Energy Conservation Part 2

Category: Environment & Green Technology Published: Monday, 25 April 2016


The use of sunlight along with use of LED technology for indirect lighting to illuminate building interiors-is consistent with one of the key factors of sustainable

design. It is necessary make optimal use of the resources already present before resorting to creating them through artificial means. Daylight harvesting using naturally available sunlight will have to be implemented to offset artificial lighting use and its associated energy consumption and cooling loads. Properly designed daylighting/use of solar energy for indirect lighting provides benefits in three broad categories: Energy, Productivity and the Environment. 

1.1.a ENERGY : 

For commercial buildings, artificial lighting, and its associated cooling energy, represent 30 percent to 40 percent of total energy use. The availability of daylight corresponds nicely with hours of operation of a typical commercial office building, and the potentials for peak saving due to reduced lighting and cooling loads are significant.


 Assuming a 20-year lifecycle, the cost of owning and operating an office building breaks down roughly into three categories: 3 percent for financing and construction, 3 percent for maintenance and energy, and 94 percent for payroll for the building's occupants. As these data suggest, the savings from even a modest improvement in employee productivity will eclipse the commercial office building's energy costs over its lifecycle.


 Daylighting, and the resulting reduction in energy required for artificial lighting and cooling, reduces the adverse environmental impacts associated with power