I do remember my regular dreams, when flipping a switch would nut turn the lights on, and locking the doors would not lock them - kinda nightmarish. So making my dreams bright was one of my first priorites when started to lucid dream.

When I ended up in a lucid dream that was at night, I yelled out loud "lights". It took couple tries, but the skies would brighten up a little with each yell. But by then, I didn't care about changing night into daytime, because funny thing happened - the dreams at night were not scary at all, since I knew I was dreaming.

And if you want to flip the switch in LD and it doesn't work, there are other ways to make light. You can make yourself a flashlight, a lightbulb on the ceiling, make the sun come out, ...

Also, eventhough what you read in tutorials is valid, please keep in mind, that it's not cast in stone. It's how it works most of time, or for most of people. Often times, when you tell yourself, that you can do it, you will be able to do it. Happy dreams