Now a days LED lights are so common everywhere, you can
direct connect it with battery no need any UPS / invertor, I decided to installed
such power LED light at roof top along day night switch, so I design a simple switch
circuit with minimum components, I found it very reliable & stable, a high power FET were used, you don’t worry about the FET you can use any powerful
N-Channel FET available in the market which are mostly used in UPS. Heat sink insulation Recommended between FET & heat sink if not no issue . I used FET 47N60C3 , LDR, Variable resistor 305 mega ohms, Pressure 12 V. Separate heat sinks for both FET & LED are recommended.
