To see with, or to be seen? For example, I'm considering a better to-see headlamp because I ride so often at night in rural areas with lots of critters.

To see with, many folks seem satisfied with the helmet-specific Light & Motion Vis models. It's one of the few L&M lights the local REI still stocks, presumably because of demand by gravel and mountain bikers.

Most others I see are regular bike headlights cobbled onto helmets and they look about as awkward as it sounds. If the light is mounted into a helmet vent, it's lower profile but can't be adjusted so it needs a broad floodlight beam. If it's adjustable it'll probably be on a mount that sticks way up.

To be seen, for years I've used a Blackburn 2'Fer, mostly as a rear light. The 2'Fer is cleverly designed, with four modes: white and red steady and flashing. A single button cycles through the modes, with blinking red the default. A long press turns it on and off. Decent strap mount although I prefer homemade straps from thin, lightweight velcro or rubber. The plastic spring clip is sturdy and secure, with more than one nib/hook doodad to grab mount straps.

On the front of my helmets, I vary between another Blackburn that's not quite as satisfactory -- the Click front -- and what was called a Vivo-Bike Illuminati, which is now only available through Chinese bulk order suppliers although some will fulfill single or small batch orders.

The Blackburn Click is white only, steady or flashing, and has a fussy on/off switch. I'd skip it. The 2'Fer is much better.

The Illuminati is a clever little thing, about the size of a Bic lighter but weighs less, with two steady and one flashing mode. It's directional but not quite bright enough for a to-see headlamp. And it has big, bright side ports, enhancing visibility. It's been so useful I may order a few more from the bulk supplier. Recently I haven't used it as often because it partially blocks my Drift Ghost X video camera mounted on my helmet.