The Swedish word for lightning is
blixt

Translations for lightning and their definitions

blixt	©
1. n-c. a bolt of lightning, a lightning bolt (single discharge of lightning)
Två blixtar slog ned i samma träd - Two bolts of lightning struck the same tree
2. n-c. a flash; a burst of light
3. n-c. a flash; device which can produce a short burst of light, e.g. for photography