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"You will always be in our hearts and on our roads." - @Giro d'Italia on Michele Scarponi
@MatthewN5
In terms of battery lights, I've found these Smart RL326R Trail 80 Lumens lights are super bright for daylight visibility:
https://www.starcyclespares.co.uk/smart-rl326r-trail-80--80-lumens--bright-rear-bike-battery-tail-light-led-red-7200-p.asp
I've still got one of their older 0.5w tail lights which has been excellent, but this one is even brighter.
On the front I've just bought a Sigma Sport Aura 45 USB front light with a shaped beam which meets German stzvo standards, so it actually does light up the road and not just dazzle oncomers. It also has an auto mode that adjusts brightness to ambient conditions: https://www.bikester.co.uk/sigma-sport-aura-45-usb-front-light-stvzo-1042199.html
But the best lights I've used are B&M dynamo lights, which come on automatically at night, and have an daytime visibility setting that really helps get you seen. I notice the difference in driver attitudes when I'm on one of my other bikes without them.