A laser-based light source comprising: - a laser being arranged to emit laser light with a laser peak emission wavelength, - a ceramic light converter being adapted to convert a part of the laser light to converted light , wherein a peak emission wavelength of the converted light is in a longer wavelength range than the laser peak emission wavelength, - a light outcoupling dome with a base area of at least 2.5 x 10 5 μm 2 , the light outcoupling dome comprising a material with a thermal conductivity of more than 25 W.m -1 .K -1 , wherein a bonding area of the base area of the light outcoupling dome of at least 8 x 10 3 μm 2 is adhesive-free bonded to the ceramic light converter , wherein the base area is at least 25 times larger than an area of the ceramic light converter being arranged to be illuminated by the laser , - a substrate thermally coupled to the light outcoupling dome , wherein - the light outcoupling dome comprises an optical axis extending through a center point of the base area and through a top of the light outcoupling dome , - a center of the ceramic light converter is arranged near to or on the optical axis of the light outcoupling dome , - the light outcoupling dome comprises a reflective structure covering a rim of the light outcoupling dome around the base area, and - the reflective structure is arranged such that converted light emitted into the light outcoupling dome from the adhesive-free bonded surface of the ceramic light converter with an angle larger than α = 65° with respect to the optical axis of the light outcoupling dome is reflected back in the direction of the ceramic light converter , whereby converted light can only leave the light outcoupling dome within an angle of α = 65° with respect to the optical axis of the light outcoupling dome . - a laser being arranged to emit laser light with a laser peak emission wavelength, - a ceramic light converter being adapted to convert a part of the laser light to converted light , wherein a peak emission wavelength of the converted light is in a longer wavelength range than the laser peak emission wavelength, - a light outcoupling dome with a base area of at least 2.5 x 10 5 μm 2 , the light outcoupling dome comprising a material with a thermal conductivity of more than 25 W.m -1 .K -1 , wherein a bonding area of the base area of the light outcoupling dome of at least 8 x 10 3 μm 2 is adhesive-free bonded to the ceramic light converter , wherein the base area is at least 25 times larger than an area of the ceramic light converter being arranged to be illuminated by the laser , - a substrate thermally coupled to the light outcoupling dome , - the light outcoupling dome comprises an optical axis extending through a center point of the base area and through a top of the light outcoupling dome , - a center of the ceramic light converter is arranged near to or on the optical axis of the light outcoupling dome , - the light outcoupling dome comprises a reflective structure covering a rim of the light outcoupling dome around the base area, and - the reflective structure is arranged such that converted light emitted into the light outcoupling dome from the adhesive-free bonded surface of the ceramic light converter with an angle larger than α = 65° with respect to the optical axis of the light outcoupling dome is reflected back in the direction of the ceramic light converter , whereby converted light can only leave the light outcoupling dome within an angle of α = 65° with respect to the optical axis of the light outcoupling dome . <EOS>