Interesting thread on Reddit along these lines, as well: <a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;whatisthisthing&#x2F;comments&#x2F;3vfam4&#x2F;update_mystery_mercury_bulb_in_the_castle_attic_i&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;whatisthisthing&#x2F;comments&#x2F;3vfam4&#x2F;upd...</a>