Back to Middle-earth Month

I definitely think that Feanor shared the technology for those blue lights. He would have considered them utilitarian and nothing like his possessiveness of the Silmarili, which I always considered to be 10% technology and 90% magic and also included, somewhat like the One Ring did for Sauron, enough of himself that it is unlikely he would have survived their breaking up. Aulë, who, among all the Valar best understands how they were made, hints at that to his brethern the Valar when they ask Feanor to turn over the Silmarili. "But Aulë the Maker said: ‘Be not hasty! We ask a greater thing than thou knowest. Let him have peace yet awhile.’"