I’ve been commuting for many years usually only putting lights on when it’s been dark. With the many close calls I’ve had with traffic, I now have lights on even through the day.
These are a couple of the lights I currently run. All are chargeable by USB either directly or via a cable, so it’s handy to charge them at work too. I’ve a Lezyne 400lmn front light, which is good enough for daytime flash and evening on lit roads. I’ve another 600lmn too for when it’s darker. On the back I use to run a Knog R70 but some water got in to it and refuses to charge or turn on every so often. I’ve replaced it with a Lezyne Strip pro but doesn’t seem to be as bright on flash mode, it’s about half an inch longer so it struggles to fit below a saddle bag. I’ve attached a smaller Knog light to the back of my helmet also to help visibility. When I put a bag on I have a fibre flare attached, that’s had some good comments from other cyclists.
Knog attached to the helmet. Lezyne strip pro, Knog R70, Lezyne 400lumen