Greetings Tx-Skydiver.
Good question - I have looked at and considered getting one on my bike.
I tried to grab one of our R&D guys who I know has recently had this question asked of them. I was unsuccessful. So, from memory (remember... old brain cells) here is what I think I know I the subject:
Generally, it will depend on how your device modulates the headlight. It may work. Here's the problem, without testing, if it works, we can't tell you for how long it may work.
Since the LED headlight is electronic, there may be some issue with the affect of the modulating device on the circuitry and the long term performance of the headlight and / or the modulator. I know "maybe" isn't a very good answer.
Do you have an issue with telling me the make / model of the device? If we're lucky, our Tech Support people have already dealt with this in the past.
At the same time, you might also contact that manufacturer and ask them the same question. They may have already done the testing and might have the answer waiting for you. If they don't, they may welcome your question because you wont' be the last one to ask.
