I work 6:00 am til 2:30 pm
I leave at 4:30 so its always dark for part of the ride
and a lot of the year for the whole ride
I have a cygolite 740 turbo on the bars and a serfas tru 600 on my helmet
on the rear I use two blackburn mars 4.0 one on blink and one constant
I also wear a lime vest and have the schwalbe big apples with the reflective stripes on them
The blackburn on the back of my helmet actually lights up my vest when it blinks or so I have been told
I have had co-workers comment that the blinking blackburns are borderline annoying but they also say they can see me from a least a half a mile
cars give me a wide birth at least till it gets light out
I dont know if I like riding better in the dark or daylight
they both have there drawbacks