For really cold weather, snowboard helmets keep the head very warm. Unfortunately we don't have a lot of weather that cold, and, while in theory non-vented helmets would be great for the rain, they aren't practical for warm weather.
Lately I've been using an older Bell Surge TF19x.


It comes with two small rear flashing lights. They use tiny button batteries that last a few weeks. I'll use one side for a while, or both, then replace the battery, and wear down the other side. The lights are pretty low profile. The helmet suspension parts are all elastic (no adjustment), with the typical over ears strap.
I've added the headlamp recently. It chews through the rechargeable AAA batteries pretty quickly.
Maybe I should consider a super-expensive helmet sometime, but this works well for me now.
Oh, I thought the visor got in the way of the top of my forward vision view, so it came off.