[LMB] Lois-Bujold Digest, Vol 164, Issue 15
howard at brazee.net
Sun Jan 13 15:54:18 GMT 2019
> On Jan 13, 2019, at 8:44 AM, Baur <baur at chello.at> wrote:
> what is a 3-way bulb?
I have a lamp with a twist switch that rotates between off, dim, medium, and high. I uses light bulbs that have two separate filaments. It’s really having 3 different light bulbs in one (combining 2 of the filaments gives the brightest light). If I look at the bottom of the bulb, I see it has separate contacts so the electricity goes in differently for the interior lights. One filament can burn out, leaving one of the third brightnesses working.
More information about the Lois-Bujold