See the whole article here: https://www.avdweb.nl/solar-bike/electronics/daytime-running-light
Why daytime running lights?
Cars are an increasing danger to cyclists. This is because the motorist is distracted by operating the abundant of electronics in the car, such as navigation, smartphone, etc. A car sometimes looks like an airplane cockpit, with the difference that in an airplane there is a co-pilot to operate everything.