[mike31154]

Never hurts to throw an idea out there, that's often how progress happens. Seems like Xenon is very similar to MH with respect to ballast technology & the amount of heat produced compared to light. One has to wonder why there aren't any commercially available Xenon fixtures though.

Then of course there's Plasma. Seemed to be a blip on the radar for our hobby in recent years, but not much heard since. LED technology is nowhere near completion in developing & I have a funny feeling diode lighting is going to push everything else aside in the next few years, execpt for certain specialty applications where a certain lighting technology is a must.