I let into natural light into my apt by opening the blinds in it during the daytime. Also, I'd light up candles for spaces that are far away from windows or didn't have windows. Or, I'd turn on my flash light and take it with me wherever I went in my apt.
I'd avoid flipping the switches on and off in short periods of time.
I unplugged appliances such as the T.V. or lamps when I wasn't using them. Peter W.