to the best of my understanding, Texas only requires a brake light mounted on the rear of the bike and a headlight on the front. You are legal to use hand signals for the rest. I don't know that I'd feel particularly SAFE using only hand signals for lane changes, etc but.... It's also widely publicized that the most visible and noticed spot on a cycle is the highest spot.. the helmet. White and bright colored helmets are widely touted as the single most important conspicuity device. SO.. yeah, this should help with some of that visibility. However, as for a turn signal... I have to wonder just exactly how confusing it would be for someone behind you when you start turning your head to look other directions!