Unlike incandescents and fluorescents (where light is emitted from a vacuum tube), LEDs are small, solid-state lamps
that produce light by passing current across layers of a semi-conductor material held inside a package.
General lighting based on solid-state lamps has a high potential in energy saving, offers vast environmental benefits, and features unsurpassed longevity, reduced maintenance, and functionality [2,3].
Solid-state lamps are a novel source for general lighting with no well-established standards developed so far.
The present work aimed at the temperature, directional, and chromatic characterization of solid-state lamps manufactured for Rural Integrated Development Services-Nepal (RIDS-Nepal) village illumination programs.
The measured angular distribution of the spectrally integrated luminous intensity for both the two solid-state lamps is depicted in Fig.