Abstract: to identify the environmental impacts associated with development proposals well in advance of theirimplementation, so that such impacts can be avoided or reduced to acceptable levels before they occur.Optimum illuminance level can reduce energy consumption as it avoids the over-provision of lighting and producesa good indoor visual environment. This indicator is assigned to encourage use of daylight instead of electriclighting, and use of automatic lighting control system for integrated daylight and electric lighting operation.However, daylight may bring along radiation to the interior and so the use of optimum external solar shadingdevices and the collection of reflected daylight are encouraged.Keywords— Labour Productivity, materials, EIA, Lean Technique