Just noticed a newer product from Morimoto lighting. They run white until you hit your turn signal where they then flash amber, then return to white light when the signal is cancelled. I have been extremely pleased with morimoto products over the years (both on bikes and cars/trucks). Their products just work.
Don't sacrifice style in the name of safety on your bike with the Morimoto LED Switchback Endicators. 100% Legal, Easy to Install, and a great design