What kind of front light is the Citi bike using? Is it a dynamo? From what I see most flash with a row of 5 LEDs, while on some other Citi bikes it looks like a single bright LED, pretty bright actually, slightly blueish. Does the light automatically switch between the 5 LED and single LED, or the user made it so? Although far not as bright as the "to see" headlights many of use use, Citi bike's front light is actually very visible in the dark.
The new batch of bikes is a slightly different design. The Cargo Carrier/Protective shield was perforated steel on the original, now the new ones are plastic... the new bikes have a single light front, and a single red light rear, on the fender... the old ones had the tail lights molded into the seat stays...