[Tobra]

You want reflecty clothes. Get vinyl reflective stickers and put them on the hat, use a mirror on the hat and/or glasses.

I like a light on the head, points where you look. Buddy had some NITESUN, or some such thing. Halogen bulb with battery pack sized and shaped like a water bottle, which was handy. Lights on the handle bars, hi/low beams. Battery did not last as long on bright, lasted plenty long, was plenty bright. Had a red flasher for under the seat. I used to take two hose clamps and put an AA sized Maglite on the handlebars. Easy to take the light with me when I parked it.

I knew a guy who used to put one of those plastic chemical lights in the mesh pocket on the back side of his shirt when did night rides You could safety pin that to the back of your shirt to good effect, maybe wear light up bracelets like I get the grand kids at the dollar store. Take a bag of them for the whole group even. Would be better for a one off though. You want lights, Maybe a light up dog collar for your arm on the traffic side. Look at LED dog collar, you could put a blinking red X on your back, theoretically.