Lights Not Working?

So in my previous dream, it was night time and almost pitch black. Also, the light switches wouldn't work. What should I do if this happens again?

Have the intention to have light. And don't think that it can't work, because if you do, it will not work.

In previous dreams, i started in my bedroom and i would switch on the lights. It didn't work because i had always that thought: "I'm gonna switch it on. Let's see if this works or not."
When i changed that thought to: "I will switch this on and i will have light, of course." It worked.