Originally Posted by
jon c.
Most states require motorcycles to run lights day and night. Many cars now come with 'always on' daytime running lights. Because they make it easier to see the vehicle. As a motorist, I know it's easier to see bikes with lights and I tend to be aware of them sooner.
They won't ensure everyone will see you. And in some situations they are of very limited value. But they help, so I use them.
If you choose not to, I don't much care.
FWIW, Canada has had compulsory daytime running lights for many years. They are the high beams running at low power and never include rear lights. I presume that's so as not to reduce the impact of brake lights.
They are very helpful on the highway and give a very good awareness of approaching vehicles. In any event, car lights are a somewhat more powerful than normal bike lights which are barely visible in daylight.
I don't general light up in daylight and, like jon c., don't much care if others do or don't.