As a professional driver, I spend a lot of time on the road, and have observed that no light short of a full emergency vehicle strobe shows up as well in full daylight as a high-viz vest.
Once one can come to terms with the fact that nothing is going to ensure ones safety in all situations and conditions, it seems wisest to cover the most bases without focusing on one solution such as bright lights.
Exercise discretion, be honest about our mental and physical limitations, and take reasonable measures without an expectation of desired results.

I wear a high-viz vest or jacket, and use a mirror. My bikes fender has an British regulation white tip with a large OE solid red lamp/reflector, a larger than average rack mounted Cateye TL-560 flasher with the daylight sensor disabled, and some additional reflective material. From the side my tires have reflective bands, plus both tail lights and the headlight have enhanced side projection. Up front I have a small flasher light, and a B&M headlight with daytime running lights.
Dyno solid lights front and rear, flashing battery lights front and rear, and high-viz, to cover the widest spectrum of conditions with redundancy for reliability and security.

I could have more, or brighter lights, wear more high-viz, and I could work on my skills, but I already do more than many of the cyclists I see, and figure if that's not good enough for prevailing conditions I shouldn't be riding there in the first place.