I'm adding front and rear turn signals and a rear brake light. I just ordered affordable, amber strobes with 22 LEDs on each strobe light (yes, they're coming from Hong Kong, but a pair of strobes for under $7.00, with the controller, was far cheaper that what I could find from sellers here). I want something bright enough to be seen in daylight. I've come to the conclusion that most younger drivers have no comprehension of hand signals after a number waved when I was signaling a right turn and they definitely don't understand the hand signal for stop. I think it's time for safety regs to be updated and require turn signals and brake lights, especially on power-assisted bicycles. Let's face it, turn signals and brake lights have been required on cars for such a long period, most drivers on the road today have no reason to know hand signals.