Glow in the Dark Embroidery Thread

I decided to steer away from thinking about everyday garments, and started experimenting with tights. I bought some glow in the dark embroidery thread and sewed into some skin coloured tights.

I photographed the embroidery thread by itself and it seemed to glow really well. However when I photographed the tights which I had sewn into the camera didn't pick up the glow. I think that maybe I need to either take the photo in a darker place or learn more about photographing it as I'm maybe using the wrong setting.