HONOLULU (KHON2) — There are more and more homeowners who are installing blue lights outside their homes. But blue lights are not necessarily good for the animals with whom we share our world.

Blue light is not inherently bad; it boosts attention and wakefulness during the day. ... Our eyes take in significantly more blue light outside than inside, even when it’s cloudy.

It’s tough to prove the effects of blue light on humans, for many reasons. For one thing, we actually need a little blue light in order to keep our eyes healthy.

Most cars in America have three colors of lights on the outside. There’s white for headlights and reverse lights, red for brake lights and rear lights and amber for turn signals, at least in the ...

Blue light and sleep. Light affects your circadian rhythm. In the morning, light signals to your body that it's time to wake up, which is why you tend to be more alert during the day.