[Bruce Adams]

The LED panel that fits into the drum is as bright as a modern car's.
The LED's that screw into the receptacle are bright but do not hold a candle to the panel type.
I suggest red, top and bottom, since, particularly with directionals, mixing the amber and red can be confusing to other drivers, especially if you also have a third brakelight bar which is all red for turns and for brakes.
The photo indicates the left turn signal is on.