light diffusing element 15 is embodied as a second encapsulant layer provided over first encapsulant layer 14 second encapsulant layer 15 includes a generally transparent substrate 16 containing a plurality of air bubbles 17 bubbles 17 are in effect discontinuities between one medium and another which serve to diffuse the light resulting in a better mix of the colors light guide 18 is connected to body 12 and receives light emitted from led dice 11 bubbles 17 of second encapsulant layer 15 effectively diffuse light from dice 11 to yield a white light source with improved uniformity in another embodiment of the invention not shown first and second encapsulant layers 14 15 can be combined into a single encapsulant layer having a plurality of air bubbles contained therein fig2 shows an exploded cross sectional view of another light source embodiment 20 having grooved substrate 21 in the embodiment shown grooves 22 are defined upon a surface of substrate 20 with substrate 20 overlaid upon first encapsulant layer 14 grooves 22 create medium discontinuities here embodied as air gaps which diffuse and redirect light emitted from led dice 11 grooves 22 may be considered elongated bubble elements and may be closed at ends of substrate 20 in operation led dice 11 fig1 produces colored lights typically red green and or blue which are used to create a white light for communication into light guide 18 discontinuities such as air bubbles 17 or grooves 22 effectively diffuse colored light emanating from led dice 11 prior to introduction into light guide 18 consequently embodiments of the present invention can produce.