A small LED (Light emitting diode) spotlight. Bought a pair of these with the aim of using them in a little project for next winter.  The objective being to give my cycle headlights a significant boost to cope with some swines "inconsiderate road users" that fail to dip their headlights. On my back road route there are no road markings, which can mean when dazzled, it's nigh on impossible to make out where the edge of the road is. On a couple of occasions, instead of risking falling off in front of oncoming traffic, I just stopped right in the middle of the road. I think they got the message...