A light emitting apparatus comprising: a LED based radiation source for emitting short wavelength light radiation within a range of about 200 nm to 550 nm; a down conversion material receiving and down converting at least some of the short wavelength light radiation emitted by the LED based radiation source and back transferring a portion of the received and down converted light radiation, by reflection and/or back scattering; an optic device, adjacent the down conversion material and the LED based radiation source and having a sidewall (1040, 1042), configured to extract light radiation back transferred from the down conversion material and light radiation from the LED based radiation source out of the optic device through the sidewall (1040, 1042); a first reflective surface at least partially surrounding the optic device for reflecting at least some of the light extracted from the optic device to pass through the sidewall; and a second reflective surface (1046A, 1046B) at least partially surrounding the LED based radiation source for reflecting at least some of the light emitted by the LED based radiation source, characterized in that a first portion of the sidewall (1040, 1042) of the optic device (608, 1008) is substantially light transmissive, and a second portion of the sidewall (1040, 1042) of the optic device (608, 1008) is substantially reflective, and the second reflective surface (614, 1046A, 1046B) is a reflective material (1046A, 1046B) applied to the second portion of the sidewall (1040, 1042). a LED based radiation source for emitting short wavelength light radiation within a range of about 200 nm to 550 nm; a down conversion material receiving and down converting at least some of the short wavelength light radiation emitted by the LED based radiation source and back transferring a portion of the received and down converted light radiation, by reflection and/or back scattering; an optic device, adjacent the down conversion material and the LED based radiation source and having a sidewall (1040, 1042), configured to extract light radiation back transferred from the down conversion material and light radiation from the LED based radiation source out of the optic device through the sidewall (1040, 1042); a first reflective surface at least partially surrounding the optic device for reflecting at least some of the light extracted from the optic device to pass through the sidewall; and a second reflective surface (1046A, 1046B) at least partially surrounding the LED based radiation source for reflecting at least some of the light emitted by the LED based radiation source, an optic device, adjacent the down conversion material and the LED based radiation source and having a sidewall (1040, 1042), configured to extract light radiation back transferred from the down conversion material and light radiation from the LED based radiation source out of the optic device through the sidewall (1040, 1042); a first reflective surface at least partially surrounding the optic device for reflecting at least some of the light extracted from the optic device to pass through the sidewall; and a second reflective surface (1046A, 1046B) at least partially surrounding the LED based radiation source for reflecting at least some of the light emitted by the LED based radiation source, characterized in that a first portion of the sidewall (1040, 1042) of the optic device (608, 1008) is substantially light transmissive, and a second portion of the sidewall (1040, 1042) of the optic device (608, 1008) is substantially reflective, and the second reflective surface (614, 1046A, 1046B) is a reflective material (1046A, 1046B) applied to the second portion of the sidewall (1040, 1042).