Some more info would help us help you...Total runtime needed? Running/biking in total darkness/on City streets/both? Have you actually run with a head lamp before? Are you against with running with something in your hands (i.e. hand held flashlight)? You posted headlamps with some large output, so I'm guessing that is your preference. I saw items 2, 3 and 4...with the Silva specs saying 300 lumens for 2.75 hours. That seems like too much light for your activities...but not sure what you really need.
Not sure about running, but from a biking perspective I generally dislike bike lights that are exclusively meant for biking only (i.e. special bands, battery packs, proprietary batteries, etc.). With flashlight technology leaping so much over the past 2 years, you could easily accommodate a standard flashlight, with AA size batteries, and take advantage of the latest technology, all the while saving yourself some money. (Well, that last part may not be true, as you will probably become addicted to flashlights like the rest of us and end up spending more money on lights than you ever thought you would. But for this specific application, in the short term, it really could save you some money.)
Again, not knowing your runtime needed or how much light you need/want, you could do a single AA or AAx2 flashlight; but you would need a good mount to attach it to your bike or helmet or both. Turns out they make one: TwoFish BikeBlocks. This way you could use standard AA batteries and take advantage of the Fenix LD20, Quark AAx2, Quark "X" AAx2, Jetbeam BA20...the list goes on and on...lots of choices here.
Someone started a "my wife needs a light for running" thread (or something like that) a few weeks ago that you should probably check out as it has some good info.
I use a Fenix LD20 with the TwoFish BikeBlocks and really like it. 100 lumens of light is plenty of output on neighborhood streets...and I can kick it up to 180 lumens if needed for busier streets, but find that I'm good with 100. I also use a Princeton EOS Bike Light in the flash mode for getting some general attention. I really like that the EOS is NOT strobe, but flashes about once every second or 1.5 seconds and find it good for general "notice me; I'm here; don't hit me" type of attention.
And with running, I doubt you would need more that 60 lumens. For running, I would have you also consider the Zebralight H51, or a right angle type light, as you can hold it while running with your fist closed on it, but still have it shine in front of you.
Also, check out varuscelli's (a CPF member) website (
http://www.ruscelli.com/biking_fenix.htm) for another type of mounting option for your bike with some good output. The spacebar is very slick, and I have been seriously considering going that route, but my BikeBlocks are serving me well. He recently mounted a Klarus XT20 with two spacebars for a serious shiner...check out his post
here for some pretty pics.
Good luck with your research.
