They are completely wireless, battery powered LED fixtures. We can do a romantic color scheme during your cocktail hour/dinner, after which we can gradually change the color to something more festive for your dance party, or we can set one color for the duration of your event. We will be on site for the at all times, so we can change the color scheme or resolve any potential issues immediately. We request an additional deposit to reserve our wireless up-lights on your date. Be sure and check back often see lots of pictures of our lighting options!