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.