A mounting structure for solid-state light sources, for example of the LED type, comprises a support board; a submount mounted on said support board and having at least one solid-state light radiation source mounted thereon; a drive board carrying drive circuitry for the light radiation source, the aforementioned drive board being mounted on the support board and extending peripherally with respect to the aforementioned submount; electrical interface connections between the submount and the drive board for connecting the light radiation source to the drive circuitry; and mechanical and thermal interface connections between the submount and the support board.