Three stories to make the point of you can't possibly have enough:

I ride with a L&M HID front, Dinotte rear, SuperFlash on helmet, and about a square yard of reflective bits with a hi-viz yellow top. I still hear "sorry I didn't see you" once in a while.

LBS owner was telling me of a similarly equipped rider with the addition of Christmas lights on the helmet and torso. He was in the bike lane on a parkway. Driver stated she never saw him despite clear lines of sight and weather.

I pass a fire station on the way home. It's on a busy two-way street. The new fire engine, red with hi-viz yellow striping and all--every single one-- lights going full tilt boogie tried to turn out into the road. They had no success until laying on the sirens and horn.

Whatever you're packin' it ain't enough.