3W.
No.
Coverage is about 15 to 20 ft, has not been tested on that specific surface.
LED is very bright.
Lillian: Thank you for your inquiry with HiomeDepot.com. While the item does not have a warranty, with proper care, the item could last for a long time. We hope this information is helpful, we appreciate your business.
The further you are away the wider the coverage but if go to far the brightness on the wall will diminish. I have mine about 20ft away from house and happy with that.
No it starts back at the original setting after its been turned off & then back on.
Yes you can do this, the colors and patterns are really beautiful!