Joined: Jan 2009
Posts: 44,180
Likes: 6,418
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
You wire them in parallel.
The prices you show are very good.
My dynamo headlight has an on/off switch, but I leave it on. My tail light doesn't have a switch. I don't really notice the drag. I think having my lights on in the daytime might make me a little safer.