Answer Question
A helmet light should be at least 700 lumens to get good night vision while mountain biking on single track. So a good light for the Troy Lee A1 or A2 helmets that isn't too expensive would be the NiteRider Lumina 750 Boost light, along with the NiteRider Lumina Helmet Mount Strap.
For a bit more brightness on the trail go with the NiteRider Lumina 950 Boost light.
In addition to this, pair your helmet light up with a handle bar light like the NiteRider Lumina Micro 600 Bike Light for the great night vision riding.
How fast does Chain Reaction Cycles take to ship bike parts?
How can I secure my bike in my garage so it can't be stolen?
What is the best single bike hitch mount rack?
What are the Best Cycling Sunglasses?
What are the best mountain biking gloves?
What does it cost to ship a Mountain Bike?
Which is better...Stan's NoTubes vs Orange Seal Tire Sealant?
What are a good pair of clear glasses to wear mountain biking?