Would the light box feature of the Topper affect my car's battery?

The lightbox is installed to an external plug and not directly to the battery to make sure it only works while the car is on.

While you're driving, it would not affect the vehicle's battery. 

Moreover, the lightbox comes with a switch that can be used to turn it off (only while you're not driving) to give you total control.

Additionally, we also went the extra mile to make sure designed with low wattage LEDs that last very long at low electricity requirements.