[math-fun] Iridium & Indium (inside future analogue of light bulbs?)

Iridium is 40x rarer than gold and total world production is only about 10 tons annually. Indium is also pretty rare, but not as rare: 1000 ton annual production. So I think if iridium is a substantial component of solid plastic lighting source then that will not be a useful technology for Average Joe Consumer. I would think you'd want ingredients common enough for million-ton production. If they can remove the need for Iridium and other rare elements, the general concept sounds excellent as a future lighting source. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)