I'd say "both" too.
And, one thing I'm always struck by (not literally!) is how DIM some cyclists' tail lights are. If you are going to put a light on the bike...be sure to check it every so often...make sure it's not obstructed...and make sure it is BRIGHT (replace those batteries if it's getting dim...or get a more modern light that is brighter). DH and I will check lights and reflectivity on the bike in a darkened room (the laundry room or garage, usually), and take spins down the neighborhood street to get a "real road" test every so often.
2007 Seven ID8 - Bontrager InForm
2003 Klein Palomino - Terry Firefly (?)
2010 Seven Cafe Racer - Bontrager InForm
2008 Cervelo P2C - Adamo Prologue Saddle