Joined: Aug 2010
Posts: 12,727
Likes: 2,105
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
What surprised me the most on those two graphs was that the drag was roughly double the electrical output.
That said, I often ride with my lights on in daytime, I know the drag is there but I can't feel it. Exception, when bike touring I am usually using my dynohub to charge batteries. Fortunately the dyno powered USB chargers are much more efficient than the hubs.