The Red Bladder wrote: In TV and theatre, it didn't take long for LEDs to replace tungsten lighting.
My memory of that transition is rather different. I remember when 'innovative' studio LED lights first appeared at the trade shows... and they were all rubbish.
Brilliant, extremely innovative idea, and fantastic potential for power saving and controllability... but they simply couldn't match the required brightness or reliability of the prevailing systems, and they weren't that cheap either.
It was actually many years before the technology and manufacturing matured to a level that really made them a genuinely practical option -- but when they got there everyone saw the benefit and quickly re-equipped.
So it was an innovation but, like most, it didn't really happen overnight and it took a few years to progress from the first examples to the workable products.