Is this solar activated?

Although the unit with light sensor turns on and off depending on the light, they are not solar powered. You still need to plug them in a power unit, but they are extremely economical and environmental friendly and you will save a lot of money compared to traditional holiday lighting solutions. To get a better idea check out our projector reviews

Also, you can adjust a timer, which are easy to find and relatively inexpensive anymore if you only want them to start at a certain time.