Abstract: The invention relates to a high-power LED luminaire for public lighting. The use of individual diffusers for each LED makes it possible to obtain a light pattern similar to the I/SI type, which is ideal for public lighting. Every PCBA, which is supplied by a power controller, can be exchanged individually by means of a simple method that only requires removing the bottom lid of the luminaire, attachment means and a cover having built-in diffusers. Once said components have been removed, the PCBA can be unscrewed from the base thereof in order to be replaced. The top casing comprises outer and inner projections which improve the temperature exchange with the environment, reducing the operating temperature of the LEDs. The bottom lid has at least one groove that allows air to circulate, also reducing the operating temperature of the LEDs.