Patent ID: 8434883

Claim:
A light emitting diode bulb comprising: a base; a LED light source on the base comprising at least one light emitting diode (LED) device configured to emit electromagnetic radiation in a wavelength range; a lens/cover on the base; a light extracting rough surface pattern on a surface of the lens/cover comprising a plurality of features having a jagged, multifaceted, pyramidal, conical or semi-rounded morphology with an aspect ratio of from 2-10 Å, an average diameter and spacing of from 10-200 nm, and a depth or a height of from 0.1-50 μm configured to reduce glare and reflection of the electromagnetic radiation; and a wavelength conversion layer on the lens/cover configured to change the wavelength range of the electromagnetic radiation emitted by the light emitting diode (LED) device, with the wavelength range and the wavelength conversion layer configured to produce a selected light output for the light emitting diode light bulb.