Noun: fireworks; pyrotechnics.
You will also see in store displays for ilotulitteita, which is partitive plural of ilotulite. These words refer to fireworks as a consumer product.
Tulitus comes from the verb tulittaa (“to fire”).
In Finland, conventional consumer fireworks (other than novelty fireworks and sparklers) are sold to the public only between Christmas and New Years, and their use is allowed only on New Year’s Eve from 6 pm until 2 am the following morning.