Or the guy can take a Dinotte 5W and mount it backwards above his panniers and guntape (use clear tape) a red lens on top (or use that red clear Xmas wrap stuff you get or ask kindly for a 2.5inx2.5in clear red at a gift shop or grocerers gift area or flower section. Put that 5W on flash mode and don't stare at the light. Aim it at the drivers eye level or just in between car/suv level (which will be slightly above a cars eyes but still hitting them) and notice the distance gap. >

Might want to put a disclaimer on the panniers saying "flash mode worst then banned Pokemon episodes" LOL



Zero_Enigma