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If half of a string of Christmas lights is out, it is likely because of a single burned-out, loose, or broken bulb within that section. Long strands of lights often contain more than one circuit, so when one bulb fails, it can cause the entire circuit (or half the strand) to go dark. To fix this, inspect the unlit section and test each bulb to ensure it is tight and functioning properly. Replacing the faulty bulb or repairing a damaged shunt will typically solve the problem.

A motion detector light may need to be reset due to a number of technical issues. These can include faulty or misadjusted sensors and burned-out bulbs. You may also need to reset a motion sensor after an electrical surge or a power outage, as these can change a light’s settings and cause it to function differently.

Yes, animals can trigger motion-sensor lights. In fact, this is a reason why some homeowners install motion-sensor lights, to catch sneaky little critters looking through the rubbish for a midnight snack. There are sensitivities to animal detection though, so you may want to look for an option that avoids animal detection as much as possible.

High-quality landscape lights that are hardwired and properly maintained can last for 10 to 25 years or more. You’ll usually get a longer lifespan from soffit lights and wall-mounted lights that aren’t directly exposed to the elements or prone to damage from foot traffic or vehicle traffic. Solar-powered and battery-powered lights often won’t last as long, but you can still expect a lifespan of five to 15 years.