Does Constant Outdoor Lighting Make Your House A Target?

I have a security light near my house. It casts a small puddle of light into my front yard. My neighbors across the street have taken things to another extreme. They leave their security lights blazing all around their house every single night, lighting up the desert. They've told me they do it for security reasons, but is this the right thing to do?

Security experts say that leaving lights blazing all night doesn’t necessarily scare off criminals. In some cases, it can even make your home more vulnerable. Research shows that smart, well-placed lighting is much more effective than just keeping everything lit

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The Myth of “Always-On” Lights

It feels intuitive: more light equals more safety, but studies show that’s not always the case. According to studies by the U.S. Department of Justice, improved street lighting can reduce crime in some areas. However, this isn't necessarily the case in all situations. About half the studies showed the extra lighting had no discernible effect.

Interestingly, British studies consistently found that crime dropped almost 29% when street lights were added. It seems that lighting helps, but only in certain situations.

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Why Too Much Light Can Backfire in Arizona

If you've got bright, unshielded lights all over your property, you might be doing more harm than good. First, the lights can create shadows and glare, making it harder to see things around your property.

Second, it's essential to find a balance between safety and the protection of one of Arizona's precious resources: our dark skies.

The International Dark-Sky Association, based in Tucson, warns that poorly aimed lights can give criminals cover instead of exposing them. Think of it like stage lighting: if it blinds you, you’re not seeing the action clearly, and it could leave parts of your home vulnerable.

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Why Smarter Lighting Equals Safer Homes

Experts recommend targeted lighting: motion-sensor lights near entry points, shielded fixtures that direct light downward, and avoiding dusk-to-dawn floodlights.

This not only saves energy but also avoids creating a “false sense of security.” Criminals are less likely to approach a home where lighting makes them visible without blinding the homeowner or neighbors.