Do they still make Sun Circle light movers? If so, I'd vote for one of them, three arms moving around so each light's illumination contributes to the entire grow room. Stick a big honkin' HPS on one arm, a smaller MH on the second, and the LED panel of your choice on the third. The HPS would provide the gross illumination numbers (and lean towards flowering), the MH would contribute a lot of light and help keep your internodal distances shorter (and also contribute some UV IF you run it in an open reflector), and the LED would help by filling in specific wavelengths. If you wish more UV - or decide to run your MH in an air-cooled reflector - you could probably figure out a way to add some fluorescent reptile bulbs here and there when the time is right.
A little complicated, and a bit expensive. But I saw some amazing results in the past with a mixture of HPS and MH lighting (at a 3:1 ratio) during flowering with a "Circle" - more than either HPS or MH alone, and even more than the same wattage of mixed lighting when they were stationary. This was before LEDs, but I'd think they could be a valuable addition to the mix in terms of their ability to supplement certain wavelengths.
Or you could just build your own kit out of the most efficient LED COBs you can get your hands on (they are available in different color temperatures, IIRC), at a spacing of one COB per square foot across your entire footprint, lol. That seems to be a rather productive way to go.
Both of those ideas seem like they could end up being rather expensive, though. If you only grow for yourself - or only gift your extra - then such ideas may not be feasible. You'd save a lot (in regards to the COB idea) in building your own, but even then the costs could be substantial in a sizable room.
