These verses ar a great tool for us as Christians. We were once in darkness but now we are light in the Lord (Eph. 5:8). We should think of ourselves as a flashlight in a power outage. We shouldn't stay hidden in a drawer, but we need to shine so that those who are still in darkness can find their way. It's not about how petty of a flashlight or lamp we are, but the fact that we give off the light. We also need to be the lamp in our household so that our children may see how to glorify God.
Don't shine so that others can see you, shine so that through you others can see him. C.S. Lewis