Most mornings, I walk early to a local espresso shop to drink coffee with a group of other old guys.
We work on solving the world's problems. (as you can see, we haven't been doing that well recently).
Anyway, I walk across a park to the coffee shop, and often it's dark.
In the winter I carry an single cell 18650 light. I have a number to choose from, but all are low cost imports. By low cost, I mean under $10.
I've had good luck with these low cost lights.
Several have been used for years.
I carry them in my jacket pocket, and keep one in each of the jackets I use.
In the summer, I carry one of the 14500 single cell lights in a pocket in my cargo shorts.
The AA size battery lights weigh less and don't bang on my leg as I walk.