You don't have to be to bright to run trails at night, but your headlamp should be.
This was a November 9th evening run starting at 6:00 pm at Komoka, and I am sure the singlets and short sleeves will be put away for warmer garments soon.
If you have not tried night running with a headlamp, you should try it, as I am sure you will be hooked.
I have a couple extra headlamps in my trunk, should you wish to come out and give it a try.
Komoka Trails, every Wednesday evening starting at 6:00 pm.