Lamp

PAR is an abbreviation formed from the initials of the words Parabolic aluminized reflector. PAR lamp is a type of lamp widely used in commercial buildings, residences and transportation vehicles. PAR lamps are used in the headlights of old vehicles, exterior lights of vehicles such as trains and airplanes, and...

Lamp and luminaire are common terms when talking about lighting. These terms are often confused and often used interchangeably. What do the names lamp and luminaire mean? Which term is correct to use when referring to a lighting unit?

T5 and T8 fluorescent tubes are often used for ambient lighting in commercial areas such as offices. T5 fluorescent light bulb is a newer technology than T8. T5 fluorescent light bulb has an efficiency of about 100 lm/W. T8 fluorescent light bulb can reach about 90 lm/W luminous efficacy.

The maintenance factor is multiplier, which refers to the decrease in light output caused by aging or contamination of the lamp. The maintenance factor refers to the light losses that occur over time and is also known as the loss factor.

The lighting unit which contains one or more electric light sources and all the parts necessary for its operation is called a fixture. Fixture provides necessary protection to light source and other equipments and controls light distribution.