Correção da frase "do not fear the dark because...''

Hello!
I really need help from you to see if this phrase is correct:

"Do not fear the dark because, in fact, the evil is afraid of the clarity. Light up the darkness".

English is not the main language of my country and the phrase need to be 100% correct because it will be written on a place that could not receive correction.
I'd like to know if the construction is correct and if it is coherent, i mean, if you can understand what it is trying to say.
Thanks to all!