canopus;

I just installed the Light On! dynamo light on one bike. Now I need to try it out on a truly dark road as it is hard to judge light output on roads with street lights. I came down with a cold the morning after finishing the installation though so it may be a few days before I do any more night riding.

As noted on the Light On! web site the light does not reach full output until you are moving fairly fast. In that respect the IQ Cyo is better for in town use IMO as it is at full output at 5 MPH or less. The Light On! light acts more like a pair of normal dynamo lights hooked up in series per what I have read.

Sorry that we are about 1000 or more miles apart.