A high intensity lamp is described herein. The lamp comprises a LED array emitting a light and a two-phase cooling apparatus. The LED array includes a plurality of LEDs. The LEDs are arranged in close proximity so that a luminous emittance from a emitter area of the LED array is at least 1000 lumens per square centimeter. The two-phase cooling apparatus is thermally coupled to the LED array. A lumen-to-weight metric of the device is at least 4000 lumens per kilogram.
