I commute to work around 5:30am and like to night ride the trails near the river. Some of the brightest bike lights can get up there in price and soon are surpassed by something better in a few months. I probably spent about the same amount of money as one top end light; but, didn't go an one and done solution for my bike. Most of the items I have are 2-3 year old; but, still work for me:
Bike:
- FOME quick release bike mount
- Alldaymall F-869 super bright 3800 lm cree LED flashlight with 3X18650 battery
- Extra Panasonic 3500mAh Orbtronic 18650 batteries
- Two Fish lockblocks flashlight holder on RR handlebar to steady the 3X18650 battery extra long LED flashlight
- TianNorth 9T6 cree bike headlamp
- extra battery pack for TianNorth
- Light and Motion Vis 180 USB rechargeable taillight
- Nori light for rims for side illumination
- extra CR2032 batteries for Nori lights emitters
Helmet:
- Topeak Mega 10w white light
- extra battery pack
- Light and motion Vis 180 USB rechargeable taillight
So far, the set-up has worked very well for road and trail alike. I use the TianNorth+Topeak Mega light for my 5:30am 7 mile work commute and add the extra 3800lm flashlight for when I do just for fun trail riding at night. I like the both lights (quick release for flashlight and rubber strap for TianNorth) because I can remove or switch to my other bikes in a 30-60 seconds or toss in my backpack at a bike rack. I also like having the flashlight I can use around the house or when traveling instead of being stuck for bike duties only.
I also like the Topeak helmet mounted spot light because it can illuminate everywhere you look at night. It really comes in handy on twisty roads/paths, approaching intersections (use the light to shine on the "no cop, no stop" drivers at 5:30am), seeing hazards earlier, and just being more aware of your surroundings.