I'd argue you want to allow much more time for them to react given that at that time of night more than a few drivers may have been imbibing and so have slower reactions. I have a 1 mile ride from a friend's house that I often do at 1:30 or 2 in the morning on a well lit, but not busy (at that time) street and I religiously slip a Hi Viz jersey over whatever I wore and run a PDWDZ and PBSF on the rear; at times of the year when cyclists are less common (Nov-Feb), I will often also add a Radbot to the seatbag.

I can usually be 60% or more of the way down the road by time the traffic light I triggered changes back, so anyone coming up has gobs of time to see me, but I still wouldnt ride with less at that time of night.

I dunno exactly how bright a Knog is, but I wouldnt feel comfy with it.


There are lots of options for a front light depending on how bright "REALLY bright" is to you. They range from something like the Dinotte 1200 @ $350 to MS, MS variant and clones for $90. IMO any sort of flashlight rig whether AA, 123, 14500 or 18650 is not enough for the conditions mentioned and the cost of a complete kit for a flashlight rig comes close to that of a MS.