This tag is for images with an emmisive red light source. There must be a red light casting a red shade either on screen or offscreen. It's important that the red light is a significant portion of the image

h4. When to use

* You can clearly see where the red light comes from, like a lamp, a bright neon sign, or sunlight coming through something red.
* The red light changes how the picture feels or looks a lot.
* The red light is visible and a key feature of the character (like with Olimar from Pikmin)

h4. When not to use

* If there's only a little bit of red such as with sci-fi suit LEDs that doesn't change the picture much.
* If the surface is red (like they're painted red or a raspberry) and not emmisive
* If there is rainbow light
* More than two different colored light/light sources

h4. Exceptions

* If the picture is heavily desaturated, but there's saturated red lights, you can use this tag regardless of the light size

h4. Example posts
* post #6771544
* post #7115304
* post #6946654
* post #6800023
* post #7139697

h4. External links

* "Wikipedia: Color temperature":https://en.wikipedia.org/wiki/Color_temperature