A lamp in your dream or vision tells you about guidance, hope, inspiration, enlightenment and confirmation in life. Another explanation is about insights, solutions, finding your way in life, follow your feelings and listen to your true self. You see the opportunities, you are the light in the situation or possibility.
You have the knowledge, wisdom, skills to be successful. An alternative explanation is to become aware of the fact that the answers you are looking for, the solutions you are looking for, are already present in your head; you just need to turn on the lamp.
Dreams or visions in which the lamps do not turn on tell you something about yourself and the way you look at things at the moment. Can't you see it, can't you reach it, the unknown, that which is not yet tangible? The shadow side of yourself and / or the situation you are in. Things aren't clear yet, you want insight, support, help or answers you can't find.
As it were, you deprive yourself of light in the darkness solutions and possibilities do not come to you if you give yourself permission to turn on the light.