You have an amazing collection Magellan, I hope to see all of it some day! Here is a shot of nearly all versions of the Nucleus, even some of the prototypes or oddities that has never been offered for sale. The "Hydra" is a double-headed Nucleus, with Nichia 219b on one end and xp-g2 on the other. They turn on at the same time. The red one is a cree xp-e, and the blue one is a 219b
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Very interesting, George. Thanks for showing those rare protos.