I've just recieved the set I ordered, front and back lights for £6.50 INC p&p. The back one is a simple 5 LED flashing light the button cycles through about 10 flashing sequences so you can even have a Knight Industries Two Thousand effect if you wish. It has what seems to be a waterproof seal and feels quite strong. The front one has four modes - 10, 27 or 56 LEDs lit and all flashing. 10 LED mode is bright and glaring and suitable for lit streets so I'm guessing the 56 LED mode is good for off road although the beam may be a bit too focussed. My guess is that it gives off about the same amount of light as a 10 watt low energy bulb, difficult to guage as it is a focussed beam. It is slightly sturdier than I expected and should cope with a couple of falls to the floor, it say water resistant but I'm going to seal the lens and put tape around the joints then it should be fine. The rear light takes 2 AA cells and the front takes 3 AA cells, should be easy enough to wire into the bike as the battery box can hold the extra electronics. I'm not going to bother yet as it may not be much hassle using rechargeables. In all this is a very cheap and easy way to get bright lights on the bike, but not with the satisfaction of having done something special. EDIT: The front light is OK but not amazingly bright, in the dark through Greenwich park I could see about enough to ride at 10mph safely. As I ride through there at 30+ I need to go back to the drawing board and no, I'm not slowing down.