Basically lamp is a device that produce light and heat either by emission,thermal or discharge radiation.It can be produced in many ways depend on manufacturing technology to create a design and suitable with application.
Over the last few years,lighting manufacture start develop the energy saving lamp and pro long the life span of lamp.When we choosing the types of lamp,the important key is must energy efficiency,suitable with design and application also have a long life span.
The efficiency of a lamp is measured in lumen per watt.From chart below,we can see the comparison about efficiency of lamps and we can decide which type more suitable with our needed and application. read more