Sparkler alternative for exiting in the dark?

We had originally planned on doing a sparkler exit as we left and had everyone lined up to the limo. After pricing these, and the expenses already paid, I don't know if I want to put out that much for sparklers, the buckets the venue wants me to get, and the sand. Does anyone have an idea that may be cheaper, good in pictures, and fun for an exit in the dark? Also we are doing a very short time frame 4 hours for ceremony, pics, dinner and reception. I don't want to have to take time to do a mock exit just for pics, my uncle did that for his wedding and it was a disaster. Any ideas?