These are very good... expensive however I think they are worth it... have had mine in pretty much daily use for the last 5 years. Zero problems.
Helmet light:
https://exposurelights.com/products/bike/helmet-lights/link-plus-daybright
Front and back:
https://exposurelights.com/products/bike/trace-tracer
Very easy to clip on/ off bike and pretty secure. Bright enough as daytime lights and plenty bright enough for nighttime use. As the they are USB rechargeable I can top them up during they from my PC if needed.
Cateye are also good, with the advantage of being significantly less expensive, even if they are not as robust. Choices....
These are also very widely used, the Nebula version, especially those on the road bikes training in Regents Park:
MOON SPORT WEBSITE | Bike - Tail Light
Very smart and the large visual footprint is good.