Firefighters quick actions prevented the spread of fire at Light Brothers in Lewes.
Six fire engines, along with two water bowsers, were sent to the site in Greystone Quarry, Southerham, on 21st February at 7.38pm.
Crews from Lewes, Hove, Preston Circus, Newhaven and Barcombe attended and tackled the blaze, in the main building, which was very quickly brought under control.
The Incident Command Unit was also requested to attend and crews remained at the scene until 12.16am the following day.
A fire investigation was carried out at the site and the cause identified as accidental, after a fire started whilst maintenance work was being undertaken.