It doesn't matter how long it is, i'm only concerned about the width being similar to the serac s2. I would also like it to be AA or AAA. I want to carry it on my Leatherman sheath.
I certainly can't think of a 1xAAA light that'll give you 90 lumen. Some lights advertised on Dealextreme might claim it, but that's to be taken with a big pinch of salt.If you can go up a size to a small 1xAA light you have some options that might fit your needs. Off the top of my head:iTP A24Sevens Mini AANitecore EZ AAFenix LD15