I use a Cygolite dart or dash, they work well (though when they get old they don't hold charge and the charging port gets finicky)

I got aero handlebars, and want to get a more sleek less bulky front light to match. Prefer USB charging, but a AAA light is ok

I looked around and the trend has been bigger brighter lights, I don't need 900 lumens, I want small frontal area but still daytime visible

thanks!

Maybe you should mount your light somewhere else such as on the fork. I made a crude mount out of PVC pipe and a hose clamp, but I think there are commercial mounts like this.

I am sort of into lights, but I have to admit, I am not aware of one specifically designed to be aero. I think that would be hard to do, given the primary goals of a headlight. But maybe someone else is. The only one that possibly came to mind was the flatter profile Blackburn Countdown 1600, but I haven't used it and am just going by its picture.
https://www.competitivecyclist.com/b...BoCftEQAvD_BwE

Specialized stix has a headset spacer mount. It sits right on your top tube. Otherwise, any flashlight format headlight hanging from your garmin mount will be about the same.

Do you want a "see" or "be seen" light? Because there are minuscule "be seen" lights if that's good enough for you.

I've got a Light & Motion Vya taillight; they make a matching headlight that's about the size of a big thumb drive, and there are others smaller than that, like the Knog Clobber.

If you don't need a ton of output, the Light and Motion Vya Pro is a solid headlight. Otherwise, the Topeak Headlux 450 is a good choice. it's also designed to fit on aerobars with their flexible mounts.

Just bought a white one of these on e-bay to strap on to my front fork.

No helmet!

Cateye Rapid:
cateye.com/intl/products/safety_lights/

With Cateye Sharp Aero Rubber Base:
cateye.com/intl/products/parts/5447040/
cateyeamerica.com/Sharp-Aero-Rubber-base-for-Rapid-X3-X2

Tiny “be seen” lights generally do not put out enough power or light to actually “be seen” by a distracted driver in the sunlight. Generally those lights are only noticeable if you are looking for them or know it’s there....which defeats the purpose of grabbing a distracted drivers attention. Pay attention on your next group ride and see how many people have those useless lights.

There are a lot of options. It really depends on what you want. How small, how bright? How many hours? Etc?

The Cygolite Dice Lights are small and compact.


The headlight will give an hour or so at high, I think. A bit longer at low beam.

Light & Motion Makes several lights about the size of a AA Penlight. They put out a respectable amount of light. But, over time I wore out the USB port making it into an expensive paperweight. I think the rain cover over the USB port also went bad.



There are quite a few other penlight style bike lights that you can look at.

Some of the China-Direct CREE lights with single bulbs and exernal battery packsare smaller than they'd otherwise look in the ads. Of course, you'd still need to find a place to put the battery pack.



I think this one is USB cable powered, but there should be small 8.4V ones too.