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Daylight derives mainly from the thermal radiation of the sun filtered through the atmosphere. It forms a continuous spectrum comprising wavelengths from ...
Wed, 22 Jun, 2016 at 3:15 PM
Loss of illuminance caused by ageing and contamination in a lighting system can be anticipated in the planning phase with the help of design factor p. T...
Wed, 29 Jun, 2016 at 9:15 AM
Economic reasons :
Reducing energy costs
Increasing lamp life
Reducing maintenance costs
Ecological reasons :
Reducing energy co...
Wed, 22 Jun, 2016 at 3:35 PM
In gas-discharge lamps light is produced through the ionisation of a gas in the
discharge tube. In the process the gas becomes conductive. There are
l...
Wed, 22 Jun, 2016 at 3:38 PM