This is a dark detecting switch with a max load of 2.5 watts. The load here represented by the 1.2 watt lamp. I am using a 1.2 watt 12v led (10 watt halogen replacement lamp) found on amazon. The 200k resister is representing a LDR also found on amazon. The MOSFET is a 2n7000g, and the NPN transistor I am using is a 2n222. This circuit is tuned to turn on at about 1 lux. Adjust the lower left resister (LDR) to watch it turn on and off between 145k and 160k. While in standby this circuit only uses around 35uA. Enjoy!
