March 8, 2024

Use C7 lights for smaller spaces, indoor decor and a softer glow, and choose C9 lights for rooflines and large outdoor displays that need to be seen from the street. C9 bulbs are bigger and brighter, while C7 bulbs are smaller and more subtle. LED versions of both save energy.

Yes, Christmas lights can run on 12 volts if they’re made for it. Most 12V Christmas lights are LEDs, which use little power and can run from a transformer, a battery pack, a car battery or a solar panel. Lower voltage also means less risk of electric shock.