I have a pink porch light up for Breast cancer awareness after recently losing someone close to me.... Green in November to honor our vets blue when a police officer is murdered to honor our men in blue.... Purple for domestic violence awareness
A blue porch light in the month of April is for Autism awareness.
People use blue porch lights to show their solidarity with fallen police officers.
Yellow porch lights are bug lights. By bug light I mean they are not supposed to attract bugs as bad as regular light bulbs.
Cancer awareness
To avoid insects
In some places a red porch light means drug dealer or prostitution.
Vehicles with red and blue lights are usually law enforcement vehicles.
red and blue
You can only have red lights on the rear of your car. And blue lights are illegal to use on any car on the street they are only for emergency vehicles blue lights are for police only
red,green, and blue
red, yellow and blue
You can put blue film over your headlights but you can not change the lights to be blue. It is illegal. Only emergency vehicles can have blue or red lights.
Red lights do not affect chickens. Chickens do not see the red or blue spectrum of light. Red and blue heat lamps are used in commercial operations when the birds are resting.
red and blue
green, blue and red
color lights actually don't blend together.
Locally to me, the blue bar on the top of the car flashes (in some other states, I believe police use red lights, or red and blue) the headlights flash and the tail lights flash.