A luminaire featuring LEDs is disclosed. Each LED is affixed to a support structure and may have an individual reflector or refractor subsystem to modify light output. Multiple air vents or radiators are provided to even the temperature distribution between LEDs. In one embodiment, the support structure is arranged as a framework of bridges between LEDs with air gaps in between bridges. A fan may be provided to further enhance cooling. The LEDs and fan may have internal or external control means, including possibly wireless means. Alternative embodiments are also disclosed.