We are now seeing the benefit of LED bulbs which are commonly seen at home contributing to our quests in saving energy. If I could recall, back in my boyhood village, I did have experienced back the lamp cycle starting from kerosene lamp, to so called coleman, then to incandescent bulb, to flourescent lamps and now LED's.
Recently I started tinkering on this products.The circuit above was traced from one of the commercial night light sold under brand
GE Etched Art Night Light which came out of the market in 2011. You can also add an on off switch.