Exposure Flare on my seatpost shining under the (seatpost mounted) rack – reflecting off the mudguard, rack etc – good ol’ glow. Then a Fibreflare across the back of the panniers, flashing, with a Cherrybomb hooked on the loop in the middle of the panniers (flashing). Then an old 5 LED Cateye on the drive side seatstay on a random flash. Loads of reflectivity and sometimes even an armband with red LEDs too.
They’re all good in their own way – the more the merrier and lots of reflective moving bits helps. The Flare is a great light on its own – very bright, but you need to jack up the mount otherwise it shines downwards. Just a bit of s/a foam padding works fine, but I’m not sure why all their extensive R&D didn’t tell them that most people’s seatposts are angled below 90 degrees. 🙂