Originally Posted by
Allan
So there needs to be a controller for the voltage and amperage coming from the battery to the light. I need to find out what the specs are to that.
That depends on what the original light did (number of modes) and what you want it to do now.
Also the type of connector it has could come into the equation.
There's nothing to stop you direct driving the headlight if the connector will allow it or removing the connector if necessary.
Alternatively (to direct drive) you could make a battery pack up and use one of the drivers that are used in torches, again depending on how the headlight is wired internally.