Bell Sports Questions and Answers

I purchased a BELL BE SEEN ARELLA X50 RECHARGEABLE BICYCLE TAIL LIGHT how long does the first charge take from RED to GREEN?I am pleased with the product, however, it lacks information for first time charging and duration between subsequent charging, i.e., RED / GREEN, ORANGE / GREEN. On another note, Walmart carried only the "Be Seen" model the ARELLA X50. please send me specifations for a :"To See And Be Seen" Bicycle Tail Light, USB rechargeable., Regards, Pier - Loma Linda, CA