“I’ve been using this headlight for 4 years now and I’m still using the original bulbs. The low beam has power enough for speeds up to 40 miles per hour and on-coming traffic ALWAYS dims their brights when I flash the 50-watt high beam.” – Link.
This one is made of 120 super-bright red LEDs, and two 1W Luxeon LEDs – Link. Schematics / Eagle CADs and more here – Link.
We'll assume you're ok with this, but you can opt-out if you wish.