Particles dark on movie export/ don't show in render1

Hi guys, I’m pretty new to touch designer, but I’ve been using a sound file CHOP exported into a noise node and a particle node to make the particles sort of go to the sound.

It all looks fine until I try to export it as a movie, where it goes really dark, you can still see them but it’s like 1/4 as bright as it is in the camera window.

If I export it from the render node you can barely see them at all/they don’t look colourful.

Any ideas what I’m doing wrong?

Thanks

Any chance you can post a sample file of what you are doing?