Obviously your view is not held by the majority of commercial builders
ahhh maybe they are just using up old stock, that's probably it, NOT. Get real and follow the experts in this subject and understand when that technology is completely viable the industry will kick into gear and use it without a doubt money has always shown the way since time began, like it or not. As I said before if industry thought it was at this point in time a better prospect it would convert, it's not happening yet, in time i6have no doubt it will but it's still in its infancy and full of troubles. While gas driven items including gas mantle lighting( Which some people pay mega money to have fitted by the way) is still the proven way to go, but fill your boots and pave the way good for you and others who are pioneering this sort of tech, when you and others have proved it
And the weight and costs have come to a sensible level I will revel in your fortune, metaphorically speaking of course.
. Phil