An LED luminaire includes a reflector, a channel, and a printed circuit board (PCB) onto which LEDs are mounted. Each of the reflector, the channel, and the PCB includes a feature(s) that permit their attachment to each other without the need for separate fasteners and tools. Embodiments of the LED luminaire may also include an optic and a pair of end caps, also designed for assembly into the LED luminaire without the use of or need for separate fasteners and tools.