Re: @Scatter - look at the numbers, not the technology
I've already assumed that they are morons, and have purchased a lifetime's supply of halogen bulbs just in case they become unobtainium. In the process, I discovered the vast difference between wholesale and retail prices! Also (see my other posts) not all Lumens are equal. The spectrum matters. Especially if you suffer, even mildly, from SAD.
(I can imagine it now, circa 2040, someone trying to get his GP to prescribe GU10 halogen bulbs. "But Doc, they're prescription-only these days! ")