about white balance

Here is a lightweight explanation on whitebalance and why it matters. From TFA:

Color temperature is measured in Kelvin (named after a rather clever physicist who was made Lord Kelvin in recognition of his work and, like all good Victorian scientists, had an excellent beard), which is pretty much the same as Celsius, but starts counting at absolute zero (-273 degrees C), rather than the freezing point of water. Its relationship to color is actually the work of Max Planck who, being more recent German scientist, had a mustache, rather than a beard.

I finally understand now why my streetlight shots come out as almost orange-black monochrome.