Portfire for lighting fireworks. Pyrotechnic device used to light fireworks called a Portfire. Portfires are excellent for lighting fireworks. Light the end and you wil get a long and continuous flame. A port fire will last for circa 3-5 minutes and will assist with lighting fireworks at arms reach. Contact the Edinburgh Fireworks Store team if you have any questions on how to use portfires to light your fireworks.