Good luck blowing out these cool new Fireworks Candles on your next birthday cake. Once lit, these overly festive candles emit a huge shower of sparks for up to 45 seconds and are perfect for big time celebrations on a birthday cake, on a Champagne bottle on New Year's Eve, at weddings, on the Fourth of July, on the Thanksgiving turkey, or just anytime you need a little more excitement than your current boring old candles are able to offer. They say they're safe for indoor or outdoor use, but I would probably stick to lighting these outdoors.