Tips 
Please do not use the battery at the same time when the power supply to avoid any excessive current bulbs burn or cause life is too short. 
Actual results and projected size of the space and the room dark about the extent, 
The smaller the space, the darker the better the results! 
Be sure to close the curtains at night to see the lights, turn on the lights to see at night or during the day and see no effect. (Buy to use in cafes, bars, shops and other places to attract customers, it is not feasible) 
8 square room in general is better, then a large number of large rooms can also be projected, but the image will be blurred because of widening and some large rooms can use multiple projection lamps placed in different locations together.