Also none of them offered output levels that were comparable to or better than the bulb I was trying to replace.
So I shopped around and decided to make my own. The approach I took was probably more complicated than what most of you will actually need, but since I put both available options in one headlight I can explain how to implement both.
LED headlights are not DOT approved, so use at your own risk. The one I made was installed on an electric moped.
This guide assumes you will be using an input voltage between 12 and 14 volts. If you are using a different input voltage or LEDs of different ratings than what is indicated in this write-up you should use an LED Calculator to determine what resistors you need to use.
I would recommend this LED Calculator
The cost of this project ranges from $15 to $65 depending on whether you are making a new headlight from scratch, or adapting an existing fixture to use LEDs. This is primarily meant to be an introduction and overview of the options available for making an LED-only headlight.