Stage lighting fixtures use the halogen metal iodide bulbs that he salivates over at the end, and already solve all of the issues he outlined. They provide their own ballasts, are metal shielded, use a lens that acts as a UV shield, have built-in cooling.
In fact the only issues with stage lighting:
1) The cooling wasn't designed to be silent (it isn't expected to be near someone in a near-silent environment)
2) The lamp casing wasn't designed to be near anything flammable (they get very hot)
3) The lens and casing is designed to throw the beam in a very small angle of spread over a reasonably long distance (they're not designed to point at your face from a few feet)
But given that, it seems reasonable that one could put it farther away and reflect it into the space you want lit.
And if he really wanted to go crazy whilst staying with LEDs, then he could just get a few of these: http://pulsarlight.com/products/chroma-range/chromaflood200/ which are used in architectural lighting and each one produces 10k lumens, and they are safe for indoor and outdoor use, are waterproof, and can be driven from standard mains power.
110V * 15A = 1650W. Room for one, at least.
This provides good illimination from at least a hundred feet. You need much less, so can lamp much lower.
Dimmers should not be in quotes, they do in fact perform dimming.