I have never seen or heard of this stuff so I don't really know anything more than what you and the product website say but it maybe that this stuff, not unlike many alt-photo processes, is UV sensitive. The website doesn't say. If so, the 60 watt bulbs are unlikely to work much better than your enlarger did. Sounds to me like your best bet is trying it outside on your next sunny day. I don't know what January in Memphis is like but, where I live, sunshine is going to be kind of scarce for the next couple of months.

Good luck with your project. How about posting your results?

Dan