Christian, I had no idea you were working for Petzl.  It seems they've come out with a headlamp made just for you.  I just got one of these e-lites and it is an amazing little light.  It's about the size of a matchbook and less than 1 ounce.  This thing is better than the BD Ion in about 10 ways.  For that size you get light output similar to the Tikka when its on the high setting, on the low setting it is more like a key chain flashlight.  It also has a flash setting, a red light, and a flash red light and a "locked off" setting.  They claim the nickel sized batteries will last 45 hours.  The batteries are also quite cheap online, about 50 cents each.  The light is supposed to work in extreme hot or cold temps and can be submerged in 1 meter of water.  It also has a build in clip so you can clip it to stuff, the cordlock on the strap doubles as a tool to open the battery compartment, and the light is on a "ball joint" so it can be swiveled in any direction.  The batteries are supposed to have a shelf life of 10 years with no loss, so its perfect to keep in your first aid kit or TAPED UNDER YOUR HELMET FOR UNEXPECTED BIVIES.  It's marketed as an emergency light but I'm considering making it my primary light for hiking, climbing, camping, etc. And, at less than 30 bucks you can buy two of them!