You can run twin dyno lights if you wire them correctly. You won't get full capacity out of either one if they're not designed for running dual lights. Like an old E6/E6z setup will get full bright, but they're halogens and together they're not as bright as an IQ Cyo.
I was running my Edelux AND E3 Supernova for a while. It gave me about 85% capacity from each one running together and 100% from either one alone.

I ran them wired serial, because only lights set up for primary/seconday setups can run parallel. The other option if your slick with electronics is to use an inline switch so you can select either/or both lights.