Linemen from Arizona Public Service have been hard at work in Puerto Rico since Hurricane Maria devastated the island in September.

A video posted to Facebook shows the results of that labor: Kids cheering as power is restored to their school.

The students had been without power for about five months since Hurricane Maria.

It took a week’s work for crews to restore power, according to APS operations and maintenance supervisor Jason Ramsay.

At the moment of truth, a group of young students shouts, “Turn on the lights!”

Applause and delighted shouts rang out when classroom lights finally flicked on.

“They got the lights on. We did it safe,” Ramsay said. “Now the kids are happy. That’s all that matters. This is why we traveled 3,000 miles.”