If your children are anything like mine there are going to be light sources all over your house at night. Tablets, video games, book lights, flashlights...you get the picture. They are connected to so many light sources all of the time. Why not use them to capture your children doing one of their favorite things? Whether it's reading in bed or playing on your phone, there are opportunities to snap lovely photos.
Another light source I love at night is window light. This is kind of the opposite of daytime window light. At night the lights are on IN the house and you need to be outside of the window. I love the fun look you get with the window light from the side. Play around one evening with this one. The kids will love being up late and you can experiment with something new. My kids are a little weary of all the pictures I take of them so new is always a good thing.
Some other common nighttime light sources are streetlights, cell phone flashlight apps, car headlights, spotlights... really the possibilities are endless. I would love to hear some of your experiences with unusual light sources. Please share in the comments. And keep having fun with seeing the light!