Non-removable minimal lights

Thieves will tear anything off if they fancy. Good lights cost more than 40 Quid. The best solution I've found is to have good removable lights. Two mounting systems I think are quite good: O-ring (Lupine and copy-cats) and, despite your reservations, Cat-eye (a number of makers design around them). There are an increasing number of good lightweight and very bright LED based lamps with Lithium battery technology available. One of my lamps that uses the CatEye mount is called "Force Flow", weighs only 250g (including mounting hardware, battery etc.) and delivers >900 Lm of light. Its battery is only 6x4x3cm large but at 5ah is sufficient to run for 3h. To put it on and off a bicycle I find it more confortable than even my Lupine--- which I like to use when going from bicycle to bicycle, especially in the winter. There are also a number of extremely competitive Chinese LED lamps out there .. all cost more than 40 Quid but even if 20..

thanks for the pointer to lupine. i'll check them out.

I really wanted to do away with the plastic mounts. I can't seem to find these "force flows". Could you point me ?