thanks for that dave
l will pick up a 10W one next time l am at kmart.
"PWM set up at a 50% duty cycle" did you build this yourself? l have see the
light brain on hippys site but while l could put it together, l couldn't do
the code(l dont think)

now, is 3 lights to many?
l am also working on an mounting a couple of leds so l can see my HRM and
speedo, and maybe even what gear l am in(but l think that would be a little
over the top, but how much could 4 leds and 2 AA batteries weigh?)

stuart