hello, I am sorry you misunderstood the item description.Shapeways only sell raw 3d prints, except prints made in colored sandstone (which is quite grainy). The print you bought is made of white plastic which is a nylon like powder fused in a solid mass. As the item has some small details, some powder maybe still trapped into it. I recommend clearing it with compressed air or washing it before painting it.
The bracelet size allow it to fit up to 19 cm of wrist circunference.
Led light are not supplied by Shapeways: if you are not able to add them by yourself, using a small chemical light may be a viable option.