The light projectors are designed to work on any surface. The requirements are minimal. It doesn’t even require a flat or bright-colored surface. It will work on trees, walls, garage doors and, of course, balconies.
We advise you to ask your neighbors (if any) if they would like the light to show on their property too if you live in a shared housing type. If not, refer to the other FAQs regarding positioning and blocking the laser beam if necessary.
For more info check out our Ultimate Guide to Laser Xmas Lights – http://laserchristmaslightshq.com/ultimate-guide-christmas-laser-lights/
Or our Holiday Projector Guide explaining the five highest quality and most affordable projectors on the market – http://laserchristmaslightshq.com/best-laser-light-projectors/