In the most basic terms, the function of norepinephrine is to mobilize the brain and body for action. Norepinephrine release is lowest during sleep, rises during wakefulness, and reaches much higher levels during situations of stress or danger, in what has been called the fight-or-flight response.n the sympathetic nervous system norepinephrine is used as a neurotransmitter by sympathetic ganglia located near the spinal cord or in the abdomen, and is also released directly into the bloodstream by the adrenal glands.
By turning lights off, you could save 10 to 20 percent of your total household electricity usage. You don't necessarily need to turn lights completely off to save energy--use a dimmer switch. Incandescent Lights
I have to heat the house anyways, and its darker, longer in the winter. in the summer, I tend to have 7 bulbs going about 6 hours a day for a total of about 200 watts. Thats about 36 kWh and at about 10 cents a kWh, about $3.60 to light my house for a month (the lesser used lights might add another $1 to that).