Yes you might want to google caesium perovskite solar panels and...

Yes you might want to google caesium perovskite solar panels and ESS formally PIO have caesium as does VUL with a reference to Geo 40 which has nothing to do with LPD but I have been following LPD from PWN days and AG did a great job putting Stategic metallurgy ? together then throwing a spanner in the works costing some PLP = LPD and PWN investors aswell as his own LIT
You might also want to google Tiwai point hydrogen which will end up exporting hydrogen from hydro electricity and water and PRL want to make hydrogen using solar ?
Bottom line is price and economic return including byproduducts which in Lepidico case was around $2k a ton ? and could be less depending on byproducts fully refined instead of exporting concentrate and byproducts such as SOP sulphate of potash which will also benefit your own economy.
Lilac instant brine is about $4k a ton and VUL is unknown though they also have thermal electricity
revenue and there's more thermal sites around the globe.