I ride home at night from work most days and so visibility is of concern to me. I've got the obligatory blinky red light on the rear of my bike, the standard red rear reflector, orange pedal reflectors, and now yellow ankle reflectors which double as a way of keeping my pants out of chain's way. I was going to buy one of those safety reflective vests, but decided against it as my backpack would cover most of it anyway. The backpack itself has a narrow reflective stripe down the center. That's all the lighted stuff at the rear; i've got the usual battery powered lights etc for the front. But i'm wondering if i should get another blinky light for the backpack - it comes with a hook part that allows for an attachment like that. I wonder though if it's a bit over the top - are drivers more likely to see two flashing lights compared to one?