The Lupine Betty claims to be brightest, claiming 1400 lumens from seven high intensity LEDs. Cost is around $1100.
The Cateye Stadium 3 uses HID bulbs and has been tested at 1600+ lumens.
Cost is around $350
If you're up for doing a little bit of DIY work designing your own light you'll get the most bang for your buck. The Seoul Semiconductor Co 'P7' LED Module is the brightest that is currently widely availabe. the module actually uses 4 LEDs on one silicon die. SSC claims it will produce 900 lumens although it actually delivers closer to 650. P7 modules sell for around $20. and people have been known to build their own bike light with as many as TEN of these.
a complete P7 flashlight sells for under $50. bike mounts and lithium batteries are another few bucks. I think this is the best route. I put two P7 flashlights with strobe on my bike for just about $100 with bike mounts, rechargeable lithium batteries, and a charger.
The brightest bike rear light available on the market is the Cygolite Hotshot Pro 150.
The brightest bike tail light available on the market is the Cygolite Hotshot Pro 150.
The brightest rear bike light available on the market is the Cygolite Hotshot Pro 150.
Sun is brightest and fire flies are dimmest source of light
a motor bike
sunlight
Light absorbs the white and makes it brighter.
that guy watches bollywood movies too much....
The brightest bicycle light available on the market is the NiteRider Pro 3600 Enduro Remote.
The brightest bicycle tail light available on the market is the Cygolite Hotshot Pro 150.
The World's Best Bike Stunter is Eviel knievel
When choosing the brightest bike headlight, look for features such as high lumens (brightness), adjustable beam angles, long battery life, durable construction, and easy mounting options.