Try a lightweight helmet mount light. It improves visibility to others, especially combined with a bike mounted light. I noticed this on other cyclists who use both bike and helmet mounted lights. The two-points of light enhance perceptions of direction, speed and distance.

So I began doing the same thing earlier this year: Vivo-Bike Illuminati on the front (supposedly 300 lumens on flash, with wraparound lens to enhance side visibility); Blackburn 2'Fer on the rear (non-directional, good side visibility). A pair of 2'Fers would do about as well, and recently have been available for less than $40 a pair on Amazon. These are small, lightweight, hold securely but are detachable for recharging, and last several hours on flash.

I usually run the white forward and red rearward facing helmet lights on flash, day and night. About the only time I turn them off is for nighttime group rides. However a few other folks run helmet lights in group rides and they don't bother me. As long as they aren't using something like a Cygolite Hotshot on full blast it's not distracting.

A helmet light gets the light up higher, above the roof line of most passenger cars, and closer to eye level with truck drivers. Bike mounted lights may be hidden by other vehicles and visible only within a narrow angle of view. Helmet lights show wherever you look -- when I see cars approaching intersections and parking lot driveway exits quickly I look directly at them. Gets their attention -- I can see them suddenly notice me, make eye contact and slow or stop.

Only a couple of times in the past year has anyone blown right in front of me despite the lights. A few weeks ago a young lady driving with her nose buried in her phone right hooked me. And a couple of nights ago, a guy who may have been drunk (he was coming from an area with nothing but bars and strip clubs) or believed his mission was more important than anyone else. He blew through two stop signs on a turn.

There are brighter lights, especially white headlights, but none I'd care to wear on a helmet. The Vivo-Bike Illuminati and similar models weigh almost nothing, so the thin stretchy rubber band mount is appropriate for the light and easy to snap on and off.

The Light & Motion helmet lights look good too, but are very expensive.