The invention discloses an illuminating device and a process for producing the same, in particular a high-power LED lamp and a production process thereof. The high-power LED lamp comprises a packaging optical system, a radiating system and a drive system, and is characterized in that the radiating system adopts a lamp body surface cross-ventilation natural heat dissipation mode; the drive system is an extra-low voltage constant pressure power supply system; and a lamp is separated from a power adapter; the production process of the high-power LED lamp comprises a packaging process of the lamp, production processes of the lamp and a light source, and a technological process of producing the lamp, and is characterized in that the packaging process comprises the following steps of cleaning, press welding and packaging; and the technological process of production comprises the following steps of plate setting, welding and closing up, hydraulic straightening system, galvanization, spraying, lifter installing, moulding bracket mounting and assembling. The high-power LED lamp and the production process thereof have the advantages of energy conservation, consumption reduction, high efficiency and safety.