Monday 23 January 2012

ZaidLearn: University Learning = OCW + OER = FREE!

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solar street lighting

Saturday 10 September 2011

Halogen Lamps – Well-Adapted For Energy Conservation


Since its inception, energy savers have been used as reflectors because they make a directional light source. Previously, it has been used as accent or task lighting. Other applications of energy saver light bulbs include its usage in slide projectors, in display lighting in various buildings like art galleries, museums, entertainment venues and landscapes to accentuate their beauty. Now, these lamps find a wider application.  
MR is short for multifaceted reflector that has an inner surface of multiple facets covered with a reflective coating. All these facets are designed in such a way that they provide complete optical control. The light coming from the filament is converted into a concentrated beam of light after striking these reflectors.
solar street lighting lamps are made from a quartz halogen filament capsule. Its reflective coating is either made of dichroic or aluminum. The dichroic coating is a thin, multilayer, non-metallic film that allows the heat coming from the capsule to go through the reflector but the visible light i.e., the radiation is reflected forward. In case of aluminum coating, both light and infra-red radiations are reflected. 
Despite being expensive, LED lighting especially lighting system lamps are rapidly becoming a norm in households and different commercial setups. The primary reason for this popularity is that it doesn’t pose any threat to the environment like the conventional bulbs do. Besides being efficient, these lamps are not much of a burden on the consumer’s wallet. The generic light bulbs have been around from decades now. Although they are not completely rejected, their presence is challenged by high-tech energy conserving products.
Those conventional incandescent bulbs were common in homes and office indoors. They were available in the range of 1.5 to 300V. The low priced incandescent bulbs sucks up quite a lot of energy.